diff --git a/src/bin/main.rs b/src/bin/main.rs
index 5ae20f4a6..58b2c00ed 100644
--- a/src/bin/main.rs
+++ b/src/bin/main.rs
@@ -1,14 +1,13 @@
 use std::env;
 use std::error::Error;
 use std::fs::File;
-use std::io::{Read, BufWriter};
+use std::io::{BufWriter, Read};
 use std::path::{Path, PathBuf};
 use std::process;
 
-use typst::Typesetter;
 use typst::export::pdf::PdfExporter;
 use typst::toddle::query::FileSystemFontProvider;
-
+use typst::Typesetter;
 
 fn main() {
     if let Err(err) = run() {
@@ -26,11 +25,16 @@ fn run() -> Result<(), Box<dyn Error>> {
 
     let source_path = Path::new(&args[1]);
 
-    // Compute the output filename from the input filename by replacing the extension.
+    // Compute the output filename from the input filename by replacing the
+    // extension.
     let dest_path = if args.len() <= 2 {
-        let stem = source_path.file_stem().ok_or_else(|| "missing destation file name")?;
+        let stem = source_path
+            .file_stem()
+            .ok_or_else(|| "missing destation file name")?;
 
-        let base = source_path.parent().ok_or_else(|| "missing destation folder")?;
+        let base = source_path
+            .parent()
+            .ok_or_else(|| "missing destation folder")?;
 
         base.join(format!("{}.pdf", stem.to_string_lossy()))
     } else {
@@ -43,7 +47,9 @@ fn run() -> Result<(), Box<dyn Error>> {
 
     let mut src = String::new();
     let mut source_file = File::open(source_path).map_err(|_| "failed to open source file")?;
-    source_file.read_to_string(&mut src).map_err(|_| "failed to read from source file")?;
+    source_file
+        .read_to_string(&mut src)
+        .map_err(|_| "failed to read from source file")?;
 
     // Create a typesetter with a font provider that provides the default fonts.
     let mut typesetter = Typesetter::new();
diff --git a/src/export/pdf.rs b/src/export/pdf.rs
index 78e48e81d..b7ad21c77 100644
--- a/src/export/pdf.rs
+++ b/src/export/pdf.rs
@@ -3,21 +3,22 @@
 use std::collections::{HashMap, HashSet};
 use std::io::{self, Write};
 
-use tide::{PdfWriter, Ref, Rect, Version, Trailer};
 use tide::content::Content;
-use tide::doc::{Catalog, PageTree, Page, Resource, Text};
-use tide::font::{Type0Font, CIDFont, CIDFontType, CIDSystemInfo, FontDescriptor, FontFlags};
-use tide::font::{GlyphUnit, CMap, CMapEncoding, WidthRecord, FontStream};
+use tide::doc::{Catalog, Page, PageTree, Resource, Text};
+use tide::font::{CIDFont, CIDFontType, CIDSystemInfo, FontDescriptor, FontFlags, Type0Font};
+use tide::font::{CMap, CMapEncoding, FontStream, GlyphUnit, WidthRecord};
+use tide::{PdfWriter, Rect, Ref, Trailer, Version};
 
-use toddle::tables::{Header, Post, OS2, HorizontalMetrics, CharMap, Name, NameEntry, MacStyleFlags};
 use toddle::font::OwnedFont;
 use toddle::query::SharedFontLoader;
+use toddle::tables::{
+    CharMap, Header, HorizontalMetrics, MacStyleFlags, Name, NameEntry, Post, OS2,
+};
 use toddle::Error as FontError;
 
-use crate::layout::{MultiLayout, Layout, LayoutAction};
+use crate::layout::{Layout, LayoutAction, MultiLayout};
 use crate::size::{Size, Size2D};
 
-
 /// Exports layouts into _PDFs_.
 #[derive(Debug)]
 pub struct PdfExporter {}
@@ -29,10 +30,16 @@ impl PdfExporter {
         PdfExporter {}
     }
 
-    /// Export a finished layouts into a writer. Returns how many bytes were written.
+    /// Export a finished layouts into a writer. Returns how many bytes were
+    /// written.
     #[inline]
-    pub fn export<W: Write>(&self, layout: &MultiLayout, loader: &SharedFontLoader, target: W)
-    -> PdfResult<usize> {
+    pub fn export<W: Write>(
+        &self,
+        layout: &MultiLayout,
+        loader: &SharedFontLoader,
+        target: W,
+    ) -> PdfResult<usize>
+    {
         let mut engine = PdfEngine::new(layout, loader, target)?;
         engine.write()
     }
@@ -59,8 +66,12 @@ struct Offsets {
 
 impl<'d, W: Write> PdfEngine<'d, W> {
     /// Create a new _PDF_ engine.
-    fn new(layout: &'d MultiLayout, loader: &SharedFontLoader, target: W)
-    -> PdfResult<PdfEngine<'d, W>> {
+    fn new(
+        layout: &'d MultiLayout,
+        loader: &SharedFontLoader,
+        target: W,
+    ) -> PdfResult<PdfEngine<'d, W>>
+    {
         // Create a subsetted PDF font for each font in the layout.
         let mut font_remap = HashMap::new();
         let fonts = {
@@ -71,24 +82,26 @@ impl<'d, W: Write> PdfEngine<'d, W> {
             for boxed in &layout.layouts {
                 for action in &boxed.actions {
                     match action {
-                        LayoutAction::WriteText(string) => {
-                            chars.entry(font)
-                                .or_insert_with(HashSet::new)
-                                .extend(string.chars())
-                        },
+                        LayoutAction::WriteText(string) => chars
+                            .entry(font)
+                            .or_insert_with(HashSet::new)
+                            .extend(string.chars()),
                         LayoutAction::SetFont(id, _) => {
                             font = *id;
                             let new_id = font_remap.len();
                             font_remap.entry(font).or_insert(new_id);
-                        },
-                        _ => {},
+                        }
+                        _ => {}
                     }
                 }
             }
 
             // Collect the fonts into a vector in the order of the values in the remapping.
             let mut loader = loader.borrow_mut();
-            let mut order = font_remap.iter().map(|(&old, &new)| (old, new)).collect::<Vec<_>>();
+            let mut order = font_remap
+                .iter()
+                .map(|(&old, &new)| (old, new))
+                .collect::<Vec<_>>();
             order.sort_by_key(|&(_, new)| new);
 
             let mut fonts = vec![];
@@ -96,8 +109,10 @@ impl<'d, W: Write> PdfEngine<'d, W> {
                 let font = loader.get_with_index(index);
                 let subsetted = font.subsetted(
                     chars[&index].iter().cloned(),
-                    &["name", "OS/2", "post", "head", "hhea", "hmtx", "maxp",
-                      "cmap", "cvt ", "fpgm", "prep", "loca", "glyf"][..]
+                    &[
+                        "name", "OS/2", "post", "head", "hhea", "hmtx", "maxp", "cmap", "cvt ",
+                        "fpgm", "prep", "loca", "glyf",
+                    ][..],
                 )?;
                 fonts.push(OwnedFont::from_bytes(subsetted)?);
             }
@@ -111,7 +126,13 @@ impl<'d, W: Write> PdfEngine<'d, W> {
         let pages = (page_tree + 1, page_tree + layout.layouts.len() as Ref);
         let contents = (pages.1 + 1, pages.1 + layout.layouts.len() as Ref);
         let font_offsets = (contents.1 + 1, contents.1 + 5 * fonts.len() as Ref);
-        let offsets = Offsets { catalog, page_tree, pages, contents, fonts: font_offsets };
+        let offsets = Offsets {
+            catalog,
+            page_tree,
+            pages,
+            contents,
+            fonts: font_offsets,
+        };
 
         Ok(PdfEngine {
             writer: PdfWriter::new(target),
@@ -129,32 +150,43 @@ impl<'d, W: Write> PdfEngine<'d, W> {
         self.write_pages()?;
         self.write_fonts()?;
         self.writer.write_xref_table()?;
-        self.writer.write_trailer(Trailer::new(self.offsets.catalog))?;
+        self.writer
+            .write_trailer(Trailer::new(self.offsets.catalog))?;
         Ok(self.writer.written())
     }
 
     /// Write the document catalog and page tree.
     fn write_page_tree(&mut self) -> PdfResult<()> {
         // The document catalog
-        self.writer.write_obj(self.offsets.catalog, &Catalog::new(self.offsets.page_tree))?;
+        self.writer
+            .write_obj(self.offsets.catalog, &Catalog::new(self.offsets.page_tree))?;
 
         // The font resources
         let offset = self.offsets.fonts.0;
-        let fonts = (0 .. self.fonts.len())
-            .map(|i| Resource::Font((i + 1) as u32, offset + 5 * i as u32));
+        let fonts =
+            (0..self.fonts.len()).map(|i| Resource::Font((i + 1) as u32, offset + 5 * i as u32));
 
         // The root page tree
-        self.writer.write_obj(self.offsets.page_tree, PageTree::new()
-            .kids(ids(self.offsets.pages))
-            .resources(fonts)
+        self.writer.write_obj(
+            self.offsets.page_tree,
+            PageTree::new()
+                .kids(ids(self.offsets.pages))
+                .resources(fonts),
         )?;
 
         // The page objects
         for (id, page) in ids(self.offsets.pages).zip(&self.layout.layouts) {
-            let rect = Rect::new(0.0, 0.0, page.dimensions.x.to_pt(), page.dimensions.y.to_pt());
-            self.writer.write_obj(id, Page::new(self.offsets.page_tree)
-                .media_box(rect)
-                .contents(ids(self.offsets.contents))
+            let rect = Rect::new(
+                0.0,
+                0.0,
+                page.dimensions.x.to_pt(),
+                page.dimensions.y.to_pt(),
+            );
+            self.writer.write_obj(
+                id,
+                Page::new(self.offsets.page_tree)
+                    .media_box(rect)
+                    .contents(ids(self.offsets.contents)),
             )?;
         }
 
@@ -202,8 +234,8 @@ impl<'d, W: Write> PdfEngine<'d, W> {
 
                     // Write the text.
                     text.tj(self.fonts[active_font.0].encode_text(&string)?);
-                },
-                LayoutAction::DebugBox(_, _) => {},
+                }
+                LayoutAction::DebugBox(_, _) => {}
             }
         }
 
@@ -217,18 +249,21 @@ impl<'d, W: Write> PdfEngine<'d, W> {
         let mut id = self.offsets.fonts.0;
 
         for font in &mut self.fonts {
-            let name = font.read_table::<Name>()?
+            let name = font
+                .read_table::<Name>()?
                 .get_decoded(NameEntry::PostScriptName)
                 .unwrap_or_else(|| "unknown".to_string());
             let base_font = format!("ABCDEF+{}", name);
 
             // Write the base font object referencing the CID font.
-            self.writer.write_obj(id,
+            self.writer.write_obj(
+                id,
                 Type0Font::new(
                     base_font.clone(),
                     CMapEncoding::Predefined("Identity-H".to_owned()),
-                    id + 1
-                ).to_unicode(id + 3)
+                    id + 1,
+                )
+                .to_unicode(id + 3),
             )?;
 
             // Extract information from the head table.
@@ -252,19 +287,22 @@ impl<'d, W: Write> PdfEngine<'d, W> {
             // Transform the width into PDF units.
             let widths: Vec<_> = font
                 .read_table::<HorizontalMetrics>()?
-                .metrics.iter()
+                .metrics
+                .iter()
                 .map(|m| font_unit_to_glyph_unit(m.advance_width as f32))
                 .collect();
 
             // Write the CID font referencing the font descriptor.
             let system_info = CIDSystemInfo::new("Adobe", "Identity", 0);
-            self.writer.write_obj(id + 1,
+            self.writer.write_obj(
+                id + 1,
                 CIDFont::new(
                     CIDFontType::Type2,
                     base_font.clone(),
                     system_info.clone(),
                     id + 2,
-                ).widths(vec![WidthRecord::start(0, widths)])
+                )
+                .widths(vec![WidthRecord::start(0, widths)]),
             )?;
 
             // Extract information from the post table.
@@ -284,24 +322,31 @@ impl<'d, W: Write> PdfEngine<'d, W> {
             let os2 = font.read_table::<OS2>()?;
 
             // Write the font descriptor (contains the global information about the font).
-            self.writer.write_obj(id + 2,
+            self.writer.write_obj(
+                id + 2,
                 FontDescriptor::new(base_font, flags, italic_angle)
                     .font_bbox(bounding_box)
                     .ascent(font_unit_to_glyph_unit(os2.s_typo_ascender as f32))
                     .descent(font_unit_to_glyph_unit(os2.s_typo_descender as f32))
-                    .cap_height(font_unit_to_glyph_unit(os2.s_cap_height.unwrap_or(os2.s_typo_ascender) as f32))
+                    .cap_height(font_unit_to_glyph_unit(
+                        os2.s_cap_height.unwrap_or(os2.s_typo_ascender) as f32,
+                    ))
                     .stem_v((10.0 + 0.244 * (os2.us_weight_class as f32 - 50.0)) as GlyphUnit)
-                    .font_file_2(id + 4)
+                    .font_file_2(id + 4),
             )?;
 
             // Write the CMap, which maps glyphs to unicode codepoints.
-            let mapping = font.read_table::<CharMap>()?
-                .mapping.iter()
+            let mapping = font
+                .read_table::<CharMap>()?
+                .mapping
+                .iter()
                 .map(|(&c, &cid)| (cid, c));
-            self.writer.write_obj(id + 3, &CMap::new("Custom", system_info, mapping))?;
+            self.writer
+                .write_obj(id + 3, &CMap::new("Custom", system_info, mapping))?;
 
             // Finally write the subsetted font program.
-            self.writer.write_obj(id + 4, &FontStream::new(font.data().get_ref()))?;
+            self.writer
+                .write_obj(id + 4, &FontStream::new(font.data().get_ref()))?;
 
             id += 5;
         }
@@ -311,8 +356,8 @@ impl<'d, W: Write> PdfEngine<'d, W> {
 }
 
 /// Create an iterator from a reference pair.
-fn ids((start, end): (Ref, Ref)) -> impl Iterator<Item=Ref> {
-    start ..= end
+fn ids((start, end): (Ref, Ref)) -> impl Iterator<Item = Ref> {
+    start..=end
 }
 
 /// The error type for _PDF_ creation.
diff --git a/src/func.rs b/src/func.rs
index cbe7a31ac..1f1b928d2 100644
--- a/src/func.rs
+++ b/src/func.rs
@@ -6,27 +6,27 @@ use std::fmt::{self, Debug, Formatter};
 
 use toddle::query::FontClass;
 
-use crate::layout::{Layout, MultiLayout , LayoutContext, LayoutResult};
+use crate::layout::{Layout, LayoutContext, LayoutResult, MultiLayout};
 use crate::parsing::{ParseContext, ParseResult};
-use crate::syntax::{SyntaxTree, FuncHeader};
-
+use crate::syntax::{FuncHeader, SyntaxTree};
 
 /// Typesetting function types.
 ///
-/// These types have to be able to parse tokens into themselves and store the relevant information
-/// from the parsing to do their role in typesetting later.
+/// These types have to be able to parse tokens into themselves and store the
+/// relevant information from the parsing to do their role in typesetting later.
 ///
-/// The trait `FunctionBounds` is automatically implemented for types which can be used as
-/// functions, that is they fulfill the bounds `Debug + PartialEq + 'static`.
+/// The trait `FunctionBounds` is automatically implemented for types which can
+/// be used as functions, that is they fulfill the bounds `Debug + PartialEq +
+/// 'static`.
 pub trait Function: FunctionBounds {
     /// Parse the header and body into this function given a context.
-    fn parse(header: &FuncHeader, body: Option<&str>, ctx: ParseContext)
-        -> ParseResult<Self> where Self: Sized;
+    fn parse(header: &FuncHeader, body: Option<&str>, ctx: ParseContext) -> ParseResult<Self>
+    where Self: Sized;
 
     /// Layout this function given a context.
     ///
-    /// Returns optionally the resulting layout and a new context if changes to the context should
-    /// be made.
+    /// Returns optionally the resulting layout and a new context if changes to
+    /// the context should be made.
     fn layout(&self, ctx: LayoutContext) -> LayoutResult<FuncCommands>;
 }
 
@@ -39,15 +39,13 @@ impl PartialEq for dyn Function {
 /// A sequence of commands requested for execution by a function.
 #[derive(Debug)]
 pub struct FuncCommands<'a> {
-    pub commands: Vec<Command<'a>>
+    pub commands: Vec<Command<'a>>,
 }
 
 impl<'a> FuncCommands<'a> {
     /// Create an empty command list.
     pub fn new() -> FuncCommands<'a> {
-        FuncCommands {
-            commands: vec![],
-        }
+        FuncCommands { commands: vec![] }
     }
 
     /// Add a command to the sequence.
@@ -79,10 +77,11 @@ pub enum Command<'a> {
     ToggleStyleClass(FontClass),
 }
 
-/// A helper trait that describes requirements for types that can implement [`Function`].
+/// A helper trait that describes requirements for types that can implement
+/// [`Function`].
 ///
-/// Automatically implemented for all types which fulfill to the bounds `Debug + PartialEq +
-/// 'static`. There should be no need to implement this manually.
+/// Automatically implemented for all types which fulfill to the bounds `Debug +
+/// PartialEq + 'static`. There should be no need to implement this manually.
 pub trait FunctionBounds: Debug {
     /// Cast self into `Any`.
     fn help_cast_as_any(&self) -> &dyn Any;
@@ -91,7 +90,9 @@ pub trait FunctionBounds: Debug {
     fn help_eq(&self, other: &dyn Function) -> bool;
 }
 
-impl<T> FunctionBounds for T where T: Debug + PartialEq + 'static {
+impl<T> FunctionBounds for T
+where T: Debug + PartialEq + 'static
+{
     fn help_cast_as_any(&self) -> &dyn Any {
         self
     }
@@ -111,13 +112,14 @@ pub struct Scope {
 }
 
 /// A function which parses a function invocation into a function type.
-type ParseFunc = dyn Fn(&FuncHeader, Option<&str>, ParseContext)
-                       -> ParseResult<Box<dyn Function>>;
+type ParseFunc = dyn Fn(&FuncHeader, Option<&str>, ParseContext) -> ParseResult<Box<dyn Function>>;
 
 impl Scope {
     /// Create a new empty scope.
     pub fn new() -> Scope {
-        Scope { parsers: HashMap::new() }
+        Scope {
+            parsers: HashMap::new(),
+        }
     }
 
     /// Create a new scope with the standard functions contained.
@@ -129,9 +131,7 @@ impl Scope {
     pub fn add<F: Function + 'static>(&mut self, name: &str) {
         self.parsers.insert(
             name.to_owned(),
-            Box::new(|h, b, c| {
-                F::parse(h, b, c).map(|func| Box::new(func) as Box<dyn Function>)
-            })
+            Box::new(|h, b, c| F::parse(h, b, c).map(|func| Box::new(func) as Box<dyn Function>)),
         );
     }
 
diff --git a/src/layout/actions.rs b/src/layout/actions.rs
index 069c3f7c9..3eb4fb7fd 100644
--- a/src/layout/actions.rs
+++ b/src/layout/actions.rs
@@ -3,11 +3,10 @@
 use std::fmt::{self, Display, Formatter};
 use std::io::{self, Write};
 
-use crate::size::Size2D;
 use super::Layout;
+use crate::size::Size2D;
 use LayoutAction::*;
 
-
 /// A layouting action.
 #[derive(Clone)]
 pub enum LayoutAction {
@@ -30,8 +29,14 @@ impl LayoutAction {
             MoveAbsolute(s) => write!(f, "m {:.4} {:.4}", s.x.to_pt(), s.y.to_pt()),
             SetFont(i, s) => write!(f, "f {} {}", i, s),
             WriteText(s) => write!(f, "w {}", s),
-            DebugBox(p, s) => write!(f, "b {} {} {} {}",
-                p.x.to_pt(), p.y.to_pt(), s.x.to_pt(), s.y.to_pt())
+            DebugBox(p, s) => write!(
+                f,
+                "b {} {} {} {}",
+                p.x.to_pt(),
+                p.y.to_pt(),
+                s.x.to_pt(),
+                s.y.to_pt()
+            ),
         }
     }
 }
@@ -81,7 +86,7 @@ impl LayoutActionList {
 
             SetFont(index, size) if (index, size) != self.active_font => {
                 self.next_font = Some((index, size));
-            },
+            }
 
             _ => {
                 if let Some(target) = self.next_pos.take() {
@@ -92,19 +97,21 @@ impl LayoutActionList {
                 }
 
                 self.actions.push(action);
-            },
+            }
         }
     }
 
     /// Add a series of actions.
-    pub fn extend<I>(&mut self, actions: I) where I: IntoIterator<Item=LayoutAction> {
+    pub fn extend<I>(&mut self, actions: I)
+    where I: IntoIterator<Item = LayoutAction> {
         for action in actions.into_iter() {
             self.add(action);
         }
     }
 
     /// Add all actions from a box layout at a position. A move to the position
-    /// is generated and all moves inside the box layout are translated as necessary.
+    /// is generated and all moves inside the box layout are translated as
+    /// necessary.
     pub fn add_box(&mut self, position: Size2D, layout: Layout) {
         if let Some(target) = self.next_pos.take() {
             self.actions.push(MoveAbsolute(target));
@@ -114,7 +121,8 @@ impl LayoutActionList {
         self.origin = position;
 
         if layout.debug_render {
-            self.actions.push(LayoutAction::DebugBox(position, layout.dimensions));
+            self.actions
+                .push(LayoutAction::DebugBox(position, layout.dimensions));
         }
 
         self.extend(layout.actions);
diff --git a/src/layout/flex.rs b/src/layout/flex.rs
index 704281d3b..ab1f066e3 100644
--- a/src/layout/flex.rs
+++ b/src/layout/flex.rs
@@ -1,6 +1,5 @@
 use super::*;
 
-
 /// Finishes a flex layout by justifying the positions of the individual boxes.
 #[derive(Debug)]
 pub struct FlexLayouter {
@@ -32,7 +31,8 @@ enum FlexUnit {
     /// A content unit to be arranged flexibly.
     Boxed(Layout),
     /// A unit which acts as glue between two [`FlexUnit::Boxed`] units and
-    /// is only present if there was no flow break in between the two surrounding boxes.
+    /// is only present if there was no flow break in between the two
+    /// surrounding boxes.
     Glue(Layout),
 }
 
@@ -107,7 +107,9 @@ impl FlexLayouter {
 
     /// Layout the box.
     fn boxed(&mut self, boxed: Layout) -> LayoutResult<()> {
-        let last_glue_x = self.last_glue.as_ref()
+        let last_glue_x = self
+            .last_glue
+            .as_ref()
             .map(|g| g.dimensions.x)
             .unwrap_or(Size::zero());
 
@@ -157,7 +159,7 @@ impl FlexLayouter {
                     // Right align everything by shifting it right by the
                     // amount of space left to the right of the line.
                     cursor + remaining_space
-                },
+                }
             };
 
             self.actions.add_box(position, layout);
@@ -173,7 +175,8 @@ impl FlexLayouter {
 
         self.dimensions.y += self.line_metrics.y;
 
-        // Reset the cursor the left and move down by the line and the inter-line spacing.
+        // Reset the cursor the left and move down by the line and the inter-line
+        // spacing.
         self.cursor.x = self.ctx.space.padding.left;
         self.cursor.y += self.line_metrics.y + self.ctx.flex_spacing;
 
diff --git a/src/layout/mod.rs b/src/layout/mod.rs
index c8d101414..14aa64172 100644
--- a/src/layout/mod.rs
+++ b/src/layout/mod.rs
@@ -4,24 +4,23 @@ use std::borrow::Cow;
 use std::io::{self, Write};
 use std::mem;
 
-use toddle::query::{SharedFontLoader, FontClass};
+use toddle::query::{FontClass, SharedFontLoader};
 use toddle::Error as FontError;
 
 use crate::func::Command;
 use crate::size::{Size, Size2D, SizeBox};
-use crate::syntax::{SyntaxTree, Node, FuncCall};
 use crate::style::TextStyle;
+use crate::syntax::{FuncCall, Node, SyntaxTree};
 
-mod text;
-mod stacked;
-mod flex;
 mod actions;
+mod flex;
+mod stacked;
+mod text;
 
 pub use actions::{LayoutAction, LayoutActionList};
+pub use flex::{FlexContext, FlexLayouter};
+pub use stacked::{StackContext, StackLayouter};
 pub use text::{layout_text, TextContext};
-pub use flex::{FlexLayouter, FlexContext};
-pub use stacked::{StackLayouter, StackContext};
-
 
 /// A box layout has a fixed width and height and composes of actions.
 #[derive(Debug, Clone)]
@@ -37,7 +36,12 @@ pub struct Layout {
 impl Layout {
     /// Serialize this layout into an output buffer.
     pub fn serialize<W: Write>(&self, f: &mut W) -> io::Result<()> {
-        writeln!(f, "{:.4} {:.4}", self.dimensions.x.to_pt(), self.dimensions.y.to_pt())?;
+        writeln!(
+            f,
+            "{:.4} {:.4}",
+            self.dimensions.x.to_pt(),
+            self.dimensions.y.to_pt()
+        )?;
         for action in &self.actions {
             action.serialize(f)?;
             writeln!(f)?;
@@ -55,9 +59,7 @@ pub struct MultiLayout {
 impl MultiLayout {
     /// Create an empty multibox layout.
     pub fn new() -> MultiLayout {
-        MultiLayout {
-            layouts: vec![],
-        }
+        MultiLayout { layouts: vec![] }
     }
 
     /// Extract a single sublayout and panic if this layout does not have
@@ -158,7 +160,7 @@ impl<'a, 'p> Layouter<'a, 'p> {
                 },
                 flex_spacing: (ctx.style.line_spacing - 1.0) * Size::pt(ctx.style.font_size),
             }),
-            style: Cow::Borrowed(ctx.style)
+            style: Cow::Borrowed(ctx.style),
         }
     }
 
@@ -175,7 +177,7 @@ impl<'a, 'p> Layouter<'a, 'p> {
                     if !self.flex_layouter.is_empty() {
                         self.layout_text(" ", true)?;
                     }
-                },
+                }
 
                 // Finish the current flex layout and add it to the box layouter.
                 Node::Newline => {
@@ -186,7 +188,7 @@ impl<'a, 'p> Layouter<'a, 'p> {
                     let size = Size::pt(self.style.font_size)
                         * (self.style.line_spacing * self.style.paragraph_spacing - 1.0);
                     self.stack_layouter.add_space(size)?;
-                },
+                }
 
                 // Toggle the text styles.
                 Node::ToggleItalics => self.style.to_mut().toggle_class(FontClass::Italic),
@@ -208,16 +210,19 @@ impl<'a, 'p> Layouter<'a, 'p> {
         }
 
         Ok(MultiLayout {
-            layouts: vec![self.stack_layouter.finish()]
+            layouts: vec![self.stack_layouter.finish()],
         })
     }
 
     /// Layout a piece of text into a box.
     fn layout_text(&mut self, text: &str, glue: bool) -> LayoutResult<()> {
-        let boxed = layout_text(text, TextContext {
-            loader: &self.ctx.loader,
-            style: &self.style,
-        })?;
+        let boxed = layout_text(
+            text,
+            TextContext {
+                loader: &self.ctx.loader,
+                style: &self.style,
+            },
+        )?;
 
         if glue {
             self.flex_layouter.add_glue(boxed);
diff --git a/src/layout/stacked.rs b/src/layout/stacked.rs
index 312681ace..5ca32970b 100644
--- a/src/layout/stacked.rs
+++ b/src/layout/stacked.rs
@@ -1,6 +1,5 @@
 use super::*;
 
-
 /// Layouts boxes block-style.
 #[derive(Debug)]
 pub struct StackLayouter {
@@ -29,10 +28,13 @@ impl StackLayouter {
                 Alignment::Right => Size2D::with_x(space.usable().x),
             },
             usable: space.usable(),
-            cursor: Size2D::new(match ctx.space.alignment {
-                Alignment::Left => space.padding.left,
-                Alignment::Right => space.dimensions.x - space.padding.right,
-            }, space.padding.top),
+            cursor: Size2D::new(
+                match ctx.space.alignment {
+                    Alignment::Left => space.padding.left,
+                    Alignment::Right => space.dimensions.x - space.padding.right,
+                },
+                space.padding.top,
+            ),
         }
     }
 
diff --git a/src/layout/text.rs b/src/layout/text.rs
index cf2580294..27b65d562 100644
--- a/src/layout/text.rs
+++ b/src/layout/text.rs
@@ -1,9 +1,8 @@
 use toddle::query::{FontQuery, SharedFontLoader};
-use toddle::tables::{Header, CharMap, HorizontalMetrics};
+use toddle::tables::{CharMap, Header, HorizontalMetrics};
 
-use crate::size::{Size, Size2D};
 use super::*;
-
+use crate::size::{Size, Size2D};
 
 /// The context for text layouting.
 #[derive(Copy, Clone)]
@@ -53,7 +52,8 @@ pub fn layout_text(text: &str, ctx: TextContext) -> LayoutResult<Layout> {
         let font_unit_to_size = |x| Size::pt(font_unit_ratio * x);
 
         // Add the char width to the total box width.
-        let glyph = font.read_table::<CharMap>()?
+        let glyph = font
+            .read_table::<CharMap>()?
             .get(character)
             .expect("layout text: font should have char");
 
@@ -61,7 +61,7 @@ pub fn layout_text(text: &str, ctx: TextContext) -> LayoutResult<Layout> {
             font.read_table::<HorizontalMetrics>()?
                 .get(glyph)
                 .expect("layout text: font should have glyph")
-                .advance_width as f32
+                .advance_width as f32,
         );
 
         let char_width = glyph_width * ctx.style.font_size;
diff --git a/src/lib.rs b/src/lib.rs
index 00ed9e298..fe9d32a60 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,26 +1,28 @@
 //! The compiler for the _Typst_ typesetting language.
 //!
 //! # Steps
-//! - **Parsing:** The parsing step first transforms a plain string into an [iterator of
-//!   tokens](crate::parsing::Tokens). Then parser constructs a syntax tree from the token stream.
-//!   The structures describing the tree can be found in the [syntax]. Dynamic functions parse
-//!   their own bodies themselves.
-//! - **Layouting:** The next step is to transform the syntax tree into a portable representation of
-//!   the typesetted document. Types for these can be found in the [layout] module.
-//! - **Exporting:** The finished document can then be exported into supported formats. Submodules
-//!   for the supported formats are located in the [export] module. Currently the only supported
-//!   format is _PDF_.
+//! - **Parsing:** The parsing step first transforms a plain string into an
+//!   [iterator of tokens](crate::parsing::Tokens). Then parser constructs a
+//!   syntax tree from the token stream. The structures describing the tree can
+//!   be found in the [syntax]. Dynamic functions parse their own bodies
+//!   themselves.
+//! - **Layouting:** The next step is to transform the syntax tree into a
+//!   portable representation of the typesetted document. Types for these can be
+//!   found in the [layout] module.
+//! - **Exporting:** The finished document can then be exported into supported
+//!   formats. Submodules for the supported formats are located in the [export]
+//!   module. Currently the only supported format is _PDF_.
 
 pub extern crate toddle;
 
 use std::cell::RefCell;
 
-use toddle::query::{FontLoader, SharedFontLoader, FontProvider};
+use toddle::query::{FontLoader, FontProvider, SharedFontLoader};
 
 use crate::func::Scope;
-use crate::parsing::{parse, ParseContext, ParseResult, ParseError};
 use crate::layout::{layout_tree, LayoutContext, MultiLayout};
-use crate::layout::{LayoutSpace, Alignment, LayoutError, LayoutResult};
+use crate::layout::{Alignment, LayoutError, LayoutResult, LayoutSpace};
+use crate::parsing::{parse, ParseContext, ParseError, ParseResult};
 use crate::style::{PageStyle, TextStyle};
 use crate::syntax::SyntaxTree;
 
@@ -29,12 +31,11 @@ mod macros;
 pub mod export;
 pub mod func;
 pub mod layout;
+pub mod library;
 pub mod parsing;
 pub mod size;
 pub mod style;
 pub mod syntax;
-pub mod library;
-
 
 /// Transforms source code into typesetted documents.
 ///
@@ -73,7 +74,8 @@ impl<'p> Typesetter<'p> {
 
     /// Add a font provider to the context of this typesetter.
     #[inline]
-    pub fn add_font_provider<P: 'p>(&mut self, provider: P) where P: FontProvider {
+    pub fn add_font_provider<P: 'p>(&mut self, provider: P)
+    where P: FontProvider {
         self.loader.get_mut().add_provider(provider);
     }
 
@@ -98,12 +100,15 @@ impl<'p> Typesetter<'p> {
             shrink_to_fit: false,
         };
 
-        let pages = layout_tree(&tree, LayoutContext {
-            loader: &self.loader,
-            style: &self.text_style,
-            space,
-            extra_space: Some(space),
-        })?;
+        let pages = layout_tree(
+            &tree,
+            LayoutContext {
+                loader: &self.loader,
+                style: &self.text_style,
+                space,
+                extra_space: Some(space),
+            },
+        )?;
 
         Ok(pages)
     }
@@ -116,7 +121,6 @@ impl<'p> Typesetter<'p> {
     }
 }
 
-
 /// The general error type for typesetting.
 pub enum TypesetError {
     /// An error that occured while parsing.
diff --git a/src/library/align.rs b/src/library/align.rs
index 322a9efae..4dc5f53c6 100644
--- a/src/library/align.rs
+++ b/src/library/align.rs
@@ -1,7 +1,6 @@
 use super::prelude::*;
 use crate::layout::Alignment;
 
-
 /// Allows to align content in different ways.
 #[derive(Debug, PartialEq)]
 pub struct AlignFunc {
@@ -10,9 +9,8 @@ pub struct AlignFunc {
 }
 
 impl Function for AlignFunc {
-    fn parse(header: &FuncHeader, body: Option<&str>, ctx: ParseContext)
-        -> ParseResult<Self> where Self: Sized {
-
+    fn parse(header: &FuncHeader, body: Option<&str>, ctx: ParseContext) -> ParseResult<Self>
+    where Self: Sized {
         if header.args.len() != 1 || !header.kwargs.is_empty() {
             return err("expected exactly one positional argument specifying the alignment");
         }
@@ -24,7 +22,10 @@ impl Function for AlignFunc {
                 s => return err(format!("invalid alignment specifier: '{}'", s)),
             }
         } else {
-            return err(format!("expected alignment specifier, found: '{}'", header.args[0]));
+            return err(format!(
+                "expected alignment specifier, found: '{}'",
+                header.args[0]
+            ));
         };
 
         let body = if let Some(body) = body {
diff --git a/src/library/mod.rs b/src/library/mod.rs
index 848ba8476..f3156b4a0 100644
--- a/src/library/mod.rs
+++ b/src/library/mod.rs
@@ -7,11 +7,11 @@ mod styles;
 
 /// Useful imports for creating your own functions.
 pub mod prelude {
-    pub use crate::syntax::{SyntaxTree, FuncHeader, Expression};
-    pub use crate::parsing::{parse, ParseContext, ParseResult, ParseError};
-    pub use crate::layout::{layout_tree, LayoutContext, MultiLayout, Layout};
-    pub use crate::layout::{LayoutResult, LayoutError};
-    pub use crate::func::{Function, Command, FuncCommands};
+    pub use crate::func::{Command, FuncCommands, Function};
+    pub use crate::layout::{layout_tree, Layout, LayoutContext, MultiLayout};
+    pub use crate::layout::{LayoutError, LayoutResult};
+    pub use crate::parsing::{parse, ParseContext, ParseError, ParseResult};
+    pub use crate::syntax::{Expression, FuncHeader, SyntaxTree};
 
     pub fn err<S: Into<String>, T>(message: S) -> ParseResult<T> {
         Err(ParseError::new(message))
@@ -19,8 +19,7 @@ pub mod prelude {
 }
 
 pub use align::AlignFunc;
-pub use styles::{ItalicFunc, BoldFunc, MonospaceFunc};
-
+pub use styles::{BoldFunc, ItalicFunc, MonospaceFunc};
 
 /// Create a scope with all standard functions.
 pub fn std() -> Scope {
diff --git a/src/library/styles.rs b/src/library/styles.rs
index c588ac5e4..666c8975d 100644
--- a/src/library/styles.rs
+++ b/src/library/styles.rs
@@ -2,7 +2,6 @@ use toddle::query::FontClass;
 
 use super::prelude::*;
 
-
 macro_rules! style_func {
     (
         $(#[$outer:meta])*
diff --git a/src/parsing/mod.rs b/src/parsing/mod.rs
index fa71270e0..0f5ca0f8a 100644
--- a/src/parsing/mod.rs
+++ b/src/parsing/mod.rs
@@ -5,14 +5,13 @@ use std::collections::HashMap;
 use unicode_xid::UnicodeXID;
 
 use crate::func::{Function, Scope};
-use crate::syntax::*;
 use crate::size::Size;
+use crate::syntax::*;
 
 mod tokens;
 
 pub use tokens::{tokenize, Tokens};
 
-
 /// Parses source code into a syntax tree given a context.
 #[inline]
 pub fn parse(src: &str, ctx: ParseContext) -> ParseResult<SyntaxTree> {
@@ -105,10 +104,7 @@ impl<'s> Parser<'s> {
         let body = self.parse_func_body(&header)?;
 
         // Finally this function is parsed to the end.
-        self.append(Node::Func(FuncCall {
-            header,
-            body,
-        }));
+        self.append(Node::Func(FuncCall { header, body }));
 
         Ok(self.switch(ParserState::Body))
     }
@@ -124,7 +120,7 @@ impl<'s> Parser<'s> {
                 } else {
                     Err(ParseError::new(format!("invalid identifier: '{}'", word)))
                 }
-            },
+            }
             _ => Err(ParseError::new("expected identifier")),
         }?;
 
@@ -138,13 +134,17 @@ impl<'s> Parser<'s> {
 
         // Check for arguments
         match self.tokens.next() {
-            Some(Token::RightBracket) => {},
+            Some(Token::RightBracket) => {}
             Some(Token::Colon) => {
                 let (args, kwargs) = self.parse_func_args()?;
                 header.args = args;
                 header.kwargs = kwargs;
-            },
-            _ => return Err(ParseError::new("expected function arguments or closing bracket")),
+            }
+            _ => {
+                return Err(ParseError::new(
+                    "expected function arguments or closing bracket",
+                ))
+            }
         }
 
         // Store the header information of the function invocation.
@@ -164,16 +164,16 @@ impl<'s> Parser<'s> {
                 Some(Token::Text(_)) | Some(Token::Quoted(_)) if !comma => {
                     args.push(self.parse_expression()?);
                     comma = true;
-                },
+                }
 
                 Some(Token::Comma) if comma => {
                     self.advance();
                     comma = false
-                },
+                }
                 Some(Token::RightBracket) => {
                     self.advance();
-                    break
-                },
+                    break;
+                }
 
                 _ if comma => return Err(ParseError::new("expected comma or closing bracket")),
                 _ => return Err(ParseError::new("expected closing bracket")),
@@ -197,7 +197,7 @@ impl<'s> Parser<'s> {
                 } else {
                     Expression::Ident(text.to_owned())
                 }
-            },
+            }
             _ => return Err(ParseError::new("expected expression")),
         })
     }
@@ -211,19 +211,25 @@ impl<'s> Parser<'s> {
         }
 
         // Now we want to parse this function dynamically.
-        let parser = self.ctx.scope.get_parser(&header.name)
+        let parser = self
+            .ctx
+            .scope
+            .get_parser(&header.name)
             .ok_or_else(|| ParseError::new(format!("unknown function: '{}'", &header.name)))?;
 
         // Do the parsing dependent on whether the function has a body.
         Ok(if has_body {
             // Find out the string which makes the body of this function.
-            let (start, end) = self.tokens.current_index().and_then(|index| {
-                find_closing_bracket(&self.src[index..])
-                    .map(|end| (index, index + end))
-            }).ok_or_else(|| ParseError::new("expected closing bracket"))?;
+            let (start, end) = self
+                .tokens
+                .current_index()
+                .and_then(|index| {
+                    find_closing_bracket(&self.src[index..]).map(|end| (index, index + end))
+                })
+                .ok_or_else(|| ParseError::new("expected closing bracket"))?;
 
             // Parse the body.
-            let body_string = &self.src[start .. end];
+            let body_string = &self.src[start..end];
             let body = parser(&header, Some(body_string), self.ctx)?;
 
             // Skip to the end of the function in the token stream.
@@ -246,12 +252,12 @@ impl<'s> Parser<'s> {
                     Token::Newline => {
                         self.append_consumed(Node::Newline);
                         self.switch(ParserState::WroteNewline);
-                    },
+                    }
                     Token::Space => self.append_space_consumed(),
                     _ => {
                         self.append_space();
                         self.switch(ParserState::Body);
-                    },
+                    }
                 },
                 ParserState::WroteNewline => match token {
                     Token::Newline | Token::Space => self.append_space_consumed(),
@@ -263,17 +269,17 @@ impl<'s> Parser<'s> {
                     Token::Newline => {
                         self.advance();
                         self.switch(ParserState::FirstNewline);
-                    },
+                    }
 
                     // Comments
                     Token::LineComment(_) | Token::BlockComment(_) => self.advance(),
                     Token::StarSlash => {
                         return Err(ParseError::new("unexpected end of block comment"));
-                    },
+                    }
 
                     // Anything else skips out of the function.
                     _ => break,
-                }
+                },
             }
         }
 
@@ -284,8 +290,9 @@ impl<'s> Parser<'s> {
     fn skip_white(&mut self) {
         while let Some(token) = self.tokens.peek() {
             match token {
-                Token::Space | Token::Newline
-                | Token::LineComment(_) | Token::BlockComment(_) => self.advance(),
+                Token::Space | Token::Newline | Token::LineComment(_) | Token::BlockComment(_) => {
+                    self.advance()
+                }
                 _ => break,
             }
         }
@@ -335,19 +342,19 @@ fn find_closing_bracket(src: &str) -> Option<usize> {
             '\\' => {
                 escaped = !escaped;
                 continue;
-            },
+            }
             ']' if !escaped && parens == 0 => return Some(index),
             '[' if !escaped => parens += 1,
             ']' if !escaped => parens -= 1,
-            _ => {},
+            _ => {}
         }
         escaped = false;
     }
     None
 }
 
-/// A peekable iterator for tokens which allows access to the original iterator inside this module
-/// (which is needed by the parser).
+/// A peekable iterator for tokens which allows access to the original iterator
+/// inside this module (which is needed by the parser).
 #[derive(Debug, Clone)]
 struct PeekableTokens<'s> {
     tokens: Tokens<'s>,
@@ -411,7 +418,6 @@ fn is_identifier(string: &str) -> bool {
     true
 }
 
-
 /// The error type for parsing.
 pub struct ParseError(String);
 
@@ -430,17 +436,16 @@ error_type! {
     show: f => f.write_str(&err.0),
 }
 
-
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::func::{Function, FuncCommands, Scope};
+    use crate::func::{FuncCommands, Function, Scope};
     use crate::layout::{LayoutContext, LayoutResult};
-    use Node::{Space as S, Newline as N, Func as F};
     use funcs::*;
+    use Node::{Func as F, Newline as N, Space as S};
 
-    /// Two test functions, one which parses it's body as another syntax tree and another one which
-    /// does not expect a body.
+    /// Two test functions, one which parses it's body as another syntax tree
+    /// and another one which does not expect a body.
     mod funcs {
         use super::*;
 
@@ -449,8 +454,8 @@ mod tests {
         pub struct TreeFn(pub SyntaxTree);
 
         impl Function for TreeFn {
-            fn parse(_: &FuncHeader, body: Option<&str>, ctx: ParseContext)
-                -> ParseResult<Self> where Self: Sized {
+            fn parse(_: &FuncHeader, body: Option<&str>, ctx: ParseContext) -> ParseResult<Self>
+            where Self: Sized {
                 if let Some(src) = body {
                     parse(src, ctx).map(|tree| TreeFn(tree))
                 } else {
@@ -468,8 +473,8 @@ mod tests {
         pub struct BodylessFn;
 
         impl Function for BodylessFn {
-            fn parse(_: &FuncHeader, body: Option<&str>, _: ParseContext)
-                -> ParseResult<Self> where Self: Sized {
+            fn parse(_: &FuncHeader, body: Option<&str>, _: ParseContext) -> ParseResult<Self>
+            where Self: Sized {
                 if body.is_none() {
                     Ok(BodylessFn)
                 } else {
@@ -485,7 +490,9 @@ mod tests {
 
     /// Test if the source code parses into the syntax tree.
     fn test(src: &str, tree: SyntaxTree) {
-        let ctx = ParseContext { scope: &Scope::new() };
+        let ctx = ParseContext {
+            scope: &Scope::new(),
+        };
         assert_eq!(parse(src, ctx).unwrap(), tree);
     }
 
@@ -497,7 +504,9 @@ mod tests {
 
     /// Test if the source parses into the error.
     fn test_err(src: &str, err: &str) {
-        let ctx = ParseContext { scope: &Scope::new() };
+        let ctx = ParseContext {
+            scope: &Scope::new(),
+        };
         assert_eq!(parse(src, ctx).unwrap_err().to_string(), err);
     }
 
@@ -509,9 +518,12 @@ mod tests {
 
     /// Create a text node.
     #[allow(non_snake_case)]
-    fn T(s: &str) -> Node { Node::Text(s.to_owned()) }
+    fn T(s: &str) -> Node {
+        Node::Text(s.to_owned())
+    }
 
-    /// Shortcut macro to create a syntax tree. Is `vec`-like and the elements are the nodes.
+    /// Shortcut macro to create a syntax tree. Is `vec`-like and the elements
+    /// are the nodes.
     macro_rules! tree {
         ($($x:expr),*) => (
             SyntaxTree { nodes: vec![$($x),*] }
diff --git a/src/parsing/tokens.rs b/src/parsing/tokens.rs
index 869e3821d..295b13d86 100644
--- a/src/parsing/tokens.rs
+++ b/src/parsing/tokens.rs
@@ -4,7 +4,6 @@ use smallvec::SmallVec;
 
 use crate::syntax::*;
 
-
 /// Builds an iterator over the tokens of the source code.
 #[inline]
 pub fn tokenize(src: &str) -> Tokens {
@@ -15,7 +14,7 @@ pub fn tokenize(src: &str) -> Tokens {
 #[derive(Debug, Clone)]
 pub struct Tokens<'s> {
     src: &'s str,
-    pub(in super) chars: PeekableChars<'s>,
+    pub(super) chars: PeekableChars<'s>,
     state: TokensState,
     stack: SmallVec<[TokensState; 1]>,
 }
@@ -56,7 +55,7 @@ impl<'s> Tokens<'s> {
 
     /// Go back to the top-of-stack state.
     fn unswitch(&mut self) {
-         self.state = self.stack.pop().unwrap_or(TokensState::Body);
+        self.state = self.stack.pop().unwrap_or(TokensState::Body);
     }
 
     /// Advance and return the given token.
@@ -67,7 +66,7 @@ impl<'s> Tokens<'s> {
 
     /// Returns a word containing the string bounded by the given indices.
     fn text(&self, start: usize, end: usize) -> Token<'s> {
-        Token::Text(&self.src[start .. end])
+        Token::Text(&self.src[start..end])
     }
 }
 
@@ -78,7 +77,8 @@ impl<'s> Iterator for Tokens<'s> {
     fn next(&mut self) -> Option<Token<'s>> {
         use TokensState as TU;
 
-        // Go to the body state if the function has a body or return to the top-of-stack state.
+        // Go to the body state if the function has a body or return to the top-of-stack
+        // state.
         if self.state == TU::MaybeBody {
             if self.chars.peek()?.1 == '[' {
                 self.state = TU::Body;
@@ -97,7 +97,7 @@ impl<'s> Iterator for Tokens<'s> {
             '[' => {
                 self.switch(TU::Function);
                 Token::LeftBracket
-            },
+            }
             ']' => {
                 if self.state == TU::Function {
                     self.state = TU::MaybeBody;
@@ -105,7 +105,7 @@ impl<'s> Iterator for Tokens<'s> {
                     self.unswitch();
                 }
                 Token::RightBracket
-            },
+            }
 
             // Line comment
             '/' if afterwards == Some('/') => {
@@ -121,8 +121,8 @@ impl<'s> Iterator for Tokens<'s> {
                 }
 
                 let end = end.0 + end.1.len_utf8();
-                Token::LineComment(&self.src[start .. end])
-            },
+                Token::LineComment(&self.src[start..end])
+            }
 
             // Block comment
             '/' if afterwards == Some('*') => {
@@ -133,17 +133,26 @@ impl<'s> Iterator for Tokens<'s> {
                 while let Some((index, c)) = self.chars.next() {
                     let after = self.chars.peek().map(|p| p.1);
                     match (c, after) {
-                        ('*', Some('/')) if nested == 0 => { self.advance(); break },
-                        ('/', Some('*')) => { self.advance(); nested += 1 },
-                        ('*', Some('/')) => { self.advance(); nested -= 1 },
-                        _ => {},
+                        ('*', Some('/')) if nested == 0 => {
+                            self.advance();
+                            break;
+                        }
+                        ('/', Some('*')) => {
+                            self.advance();
+                            nested += 1
+                        }
+                        ('*', Some('/')) => {
+                            self.advance();
+                            nested -= 1
+                        }
+                        _ => {}
                     }
                     end = (index, c);
                 }
 
                 let end = end.0 + end.1.len_utf8();
-                Token::BlockComment(&self.src[start .. end])
-            },
+                Token::BlockComment(&self.src[start..end])
+            }
 
             // Unexpected end of block comment
             '*' if afterwards == Some('/') => self.consumed(Token::StarSlash),
@@ -189,7 +198,7 @@ impl<'s> Iterator for Tokens<'s> {
                 }
 
                 let end_pos = end.0 + end.1.len_utf8();
-                Token::Quoted(&self.src[next_pos + 1 .. end_pos])
+                Token::Quoted(&self.src[next_pos + 1..end_pos])
             }
 
             // Escaping
@@ -207,7 +216,7 @@ impl<'s> Iterator for Tokens<'s> {
                 }
 
                 Token::Text("\\")
-            },
+            }
 
             // Normal text
             _ => {
@@ -241,7 +250,7 @@ impl<'s> Iterator for Tokens<'s> {
 
                 let end_pos = end.0 + end.1.len_utf8();
                 self.text(next_pos, end_pos)
-            },
+            }
         })
     }
 }
@@ -328,20 +337,20 @@ impl Iterator for PeekableChars<'_> {
             Some(value) => {
                 self.peek1 = self.peek2.take();
                 value
-            },
+            }
             None => self.next_inner(),
         }
     }
 }
 
-
 #[cfg(test)]
 mod tests {
     use super::*;
-    use Token::{Space as S, Newline as N, LeftBracket as L, RightBracket as R,
-                Colon as C, Equals as E, Quoted as Q, Underscore as TU, Star as TS,
-                Backtick as TB, Text as T, LineComment as LC, BlockComment as BC,
-                StarSlash as SS};
+    use Token::{
+        Backtick as TB, BlockComment as BC, Colon as C, Equals as E, LeftBracket as L,
+        LineComment as LC, Newline as N, Quoted as Q, RightBracket as R, Space as S, Star as TS,
+        StarSlash as SS, Text as T, Underscore as TU,
+    };
 
     /// Test if the source code tokenizes to the tokens.
     fn test(src: &str, tokens: Vec<Token>) {
diff --git a/src/size.rs b/src/size.rs
index f2e44e47f..e837a6398 100644
--- a/src/size.rs
+++ b/src/size.rs
@@ -6,7 +6,6 @@ use std::iter::Sum;
 use std::ops::*;
 use std::str::FromStr;
 
-
 /// A general spacing type.
 #[derive(Copy, Clone, PartialEq, Default)]
 pub struct Size {
@@ -39,57 +38,89 @@ pub struct SizeBox {
 impl Size {
     /// Create a zeroed size.
     #[inline]
-    pub fn zero() -> Size { Size::default() }
+    pub fn zero() -> Size {
+        Size::default()
+    }
 
     /// Create a size from an amount of points.
     #[inline]
-    pub fn pt(points: f32) -> Size { Size { points } }
+    pub fn pt(points: f32) -> Size {
+        Size { points }
+    }
 
     /// Create a size from an amount of millimeters.
     #[inline]
-    pub fn mm(mm: f32) -> Size { Size { points: 2.83465 * mm  } }
+    pub fn mm(mm: f32) -> Size {
+        Size {
+            points: 2.83465 * mm,
+        }
+    }
 
     /// Create a size from an amount of centimeters.
     #[inline]
-    pub fn cm(cm: f32) -> Size { Size { points: 28.3465 * cm } }
+    pub fn cm(cm: f32) -> Size {
+        Size {
+            points: 28.3465 * cm,
+        }
+    }
 
     /// Create a size from an amount of inches.
     #[inline]
-    pub fn inches(inches: f32) -> Size { Size { points: 72.0 * inches } }
+    pub fn inches(inches: f32) -> Size {
+        Size {
+            points: 72.0 * inches,
+        }
+    }
 
     /// Convert this size into points.
     #[inline]
-    pub fn to_pt(&self) -> f32 { self.points }
+    pub fn to_pt(&self) -> f32 {
+        self.points
+    }
 
     /// Convert this size into millimeters.
     #[inline]
-    pub fn to_mm(&self) -> f32 { self.points * 0.352778 }
+    pub fn to_mm(&self) -> f32 {
+        self.points * 0.352778
+    }
 
     /// Convert this size into centimeters.
     #[inline]
-    pub fn to_cm(&self) -> f32 { self.points * 0.0352778 }
+    pub fn to_cm(&self) -> f32 {
+        self.points * 0.0352778
+    }
 
     /// Convert this size into inches.
     #[inline]
-    pub fn to_inches(&self) -> f32 { self.points * 0.0138889 }
+    pub fn to_inches(&self) -> f32 {
+        self.points * 0.0138889
+    }
 }
 
 impl Size2D {
     /// Create a new vector from two sizes.
     #[inline]
-    pub fn new(x: Size, y: Size) -> Size2D { Size2D { x, y } }
+    pub fn new(x: Size, y: Size) -> Size2D {
+        Size2D { x, y }
+    }
 
     /// Create a vector with all set to zero.
     #[inline]
-    pub fn zero() -> Size2D { Size2D::default() }
+    pub fn zero() -> Size2D {
+        Size2D::default()
+    }
 
     /// Create a new vector with `y` set to zero and `x` to a value.
     #[inline]
-    pub fn with_x(x: Size) -> Size2D { Size2D { x, y: Size::zero() } }
+    pub fn with_x(x: Size) -> Size2D {
+        Size2D { x, y: Size::zero() }
+    }
 
     /// Create a new vector with `x` set to zero and `y` to a value.
     #[inline]
-    pub fn with_y(y: Size) -> Size2D { Size2D { x: Size::zero(), y } }
+    pub fn with_y(y: Size) -> Size2D {
+        Size2D { x: Size::zero(), y }
+    }
 
     /// Return a [`Size2D`] padded by the paddings of the given box.
     #[inline]
@@ -105,7 +136,12 @@ impl SizeBox {
     /// Create a new box from four sizes.
     #[inline]
     pub fn new(left: Size, top: Size, right: Size, bottom: Size) -> SizeBox {
-        SizeBox { left, top, right, bottom }
+        SizeBox {
+            left,
+            top,
+            right,
+            bottom,
+        }
     }
 
     /// Create a box with all set to zero.
@@ -117,12 +153,20 @@ impl SizeBox {
 
 /// The maximum of two sizes.
 pub fn max(a: Size, b: Size) -> Size {
-    if a >= b { a } else { b }
+    if a >= b {
+        a
+    } else {
+        b
+    }
 }
 
 /// The minimum of two sizes.
 pub fn min(a: Size, b: Size) -> Size {
-    if a <= b { a } else { b }
+    if a <= b {
+        a
+    } else {
+        b
+    }
 }
 
 //------------------------------------------------------------------------------------------------//
@@ -146,10 +190,11 @@ impl FromStr for Size {
             return Err(ParseSizeError);
         }
 
-        let value = src[.. src.len() - 2].parse::<f32>()
+        let value = src[..src.len() - 2]
+            .parse::<f32>()
             .map_err(|_| ParseSizeError)?;
 
-        Ok(match &src[src.len() - 2 ..] {
+        Ok(match &src[src.len() - 2..] {
             "pt" => Size::pt(value),
             "mm" => Size::mm(value),
             "cm" => Size::cm(value),
@@ -171,13 +216,16 @@ impl Neg for Size {
 
     #[inline]
     fn neg(self) -> Size {
-        Size { points: -self.points }
+        Size {
+            points: -self.points,
+        }
     }
 }
 
 impl Sum for Size {
     #[inline]
-    fn sum<I>(iter: I) -> Size where I: Iterator<Item=Size> {
+    fn sum<I>(iter: I) -> Size
+    where I: Iterator<Item = Size> {
         iter.fold(Size::zero(), Add::add)
     }
 }
@@ -189,7 +237,9 @@ macro_rules! impl_reflexive {
 
             #[inline]
             fn $func(self, other: Size) -> Size {
-                Size { points: $trait::$func(self.points, other.points) }
+                Size {
+                    points: $trait::$func(self.points, other.points),
+                }
             }
         }
 
@@ -209,7 +259,9 @@ macro_rules! impl_num_back {
 
             #[inline]
             fn $func(self, other: $ty) -> Size {
-                Size { points: $trait::$func(self.points, other as f32) }
+                Size {
+                    points: $trait::$func(self.points, other as f32),
+                }
             }
         }
 
@@ -231,7 +283,9 @@ macro_rules! impl_num_both {
 
             #[inline]
             fn $func(self, other: Size) -> Size {
-                Size { points: $trait::$func(self as f32, other.points) }
+                Size {
+                    points: $trait::$func(self as f32, other.points),
+                }
             }
         }
     };
@@ -257,7 +311,10 @@ impl Neg for Size2D {
 
     #[inline]
     fn neg(self) -> Size2D {
-        Size2D { x: -self.x, y: -self.y }
+        Size2D {
+            x: -self.x,
+            y: -self.y,
+        }
     }
 }
 
@@ -336,8 +393,11 @@ impl_num_back2d!(Div, div, DivAssign, div_assign, i32);
 
 impl Display for SizeBox {
     fn fmt(&self, f: &mut Formatter) -> fmt::Result {
-        write!(f, "[left: {}, top: {}, right: {}, bottom: {}]",
-            self.left, self.top, self.right, self.bottom)
+        write!(
+            f,
+            "[left: {}, top: {}, right: {}, bottom: {}]",
+            self.left, self.top, self.right, self.bottom
+        )
     }
 }
 
diff --git a/src/style.rs b/src/style.rs
index b9c377905..3bc1e33f2 100644
--- a/src/style.rs
+++ b/src/style.rs
@@ -4,14 +4,13 @@ use toddle::query::FontClass;
 
 use crate::size::{Size, Size2D, SizeBox};
 
-
 /// Default styles for text.
 #[derive(Debug, Clone)]
 pub struct TextStyle {
     /// The classes the font we want has to be part of.
     pub classes: Vec<FontClass>,
-    /// A sequence of classes. We need the font to be part of at least one of these
-    /// and preferably the leftmost possible.
+    /// A sequence of classes. We need the font to be part of at least one of
+    /// these and preferably the leftmost possible.
     pub fallback: Vec<FontClass>,
     /// The font size.
     pub font_size: f32,
@@ -26,13 +25,14 @@ impl TextStyle {
     ///
     /// If the class was one of _italic_ or _bold_, then:
     /// - If it was not present, the _regular_ class will be removed.
-    /// - If it was present, the _regular_ class will be added in case the
-    ///   other style class is not present.
+    /// - If it was present, the _regular_ class will be added in case the other
+    ///   style class is not present.
     pub fn toggle_class(&mut self, class: FontClass) {
         if self.classes.contains(&class) {
             self.classes.retain(|x| x != &class);
             if (class == FontClass::Italic && !self.classes.contains(&FontClass::Bold))
-               || (class == FontClass::Bold && !self.classes.contains(&FontClass::Italic)) {
+                || (class == FontClass::Bold && !self.classes.contains(&FontClass::Italic))
+            {
                 self.classes.push(FontClass::Regular);
             }
         } else {
diff --git a/src/syntax.rs b/src/syntax.rs
index b21406420..9c7e4908b 100644
--- a/src/syntax.rs
+++ b/src/syntax.rs
@@ -6,24 +6,26 @@ use std::fmt::{self, Display, Formatter};
 use crate::func::Function;
 use crate::size::Size;
 
-
 /// A logical unit of the incoming text stream.
 #[derive(Debug, Copy, Clone, Eq, PartialEq)]
 pub enum Token<'s> {
     /// One or more whitespace (non-newline) codepoints.
     Space,
-    /// A line feed (`\n`, `\r\n` and some more as defined by the Unicode standard).
+    /// A line feed (`\n`, `\r\n` and some more as defined by the Unicode
+    /// standard).
     Newline,
     /// A left bracket: `[`.
     LeftBracket,
     /// A right bracket: `]`.
     RightBracket,
-    /// A colon (`:`) indicating the beginning of function arguments (Function header only).
+    /// A colon (`:`) indicating the beginning of function arguments (Function
+    /// header only).
     ///
-    /// If a colon occurs outside of a function header, it will be tokenized as a
-    /// [Word](Token::Word).
+    /// If a colon occurs outside of a function header, it will be tokenized as
+    /// a [Word](Token::Word).
     Colon,
-    /// An equals (`=`) sign assigning a function argument a value (Function header only).
+    /// An equals (`=`) sign assigning a function argument a value (Function
+    /// header only).
     Equals,
     /// A comma (`,`) separating two function arguments (Function header only).
     Comma,
@@ -39,8 +41,9 @@ pub enum Token<'s> {
     LineComment(&'s str),
     /// A block comment.
     BlockComment(&'s str),
-    /// A star followed by a slash unexpectedly ending a block comment (the comment was not started
-    /// before, otherwise a [BlockComment](Token::BlockComment) would be returned).
+    /// A star followed by a slash unexpectedly ending a block comment (the
+    /// comment was not started before, otherwise a
+    /// [BlockComment](Token::BlockComment) would be returned).
     StarSlash,
     /// Everything else is just text.
     Text(&'s str),
@@ -98,7 +101,7 @@ impl PartialEq for FuncCall {
 pub struct FuncHeader {
     pub name: String,
     pub args: Vec<Expression>,
-    pub kwargs: HashMap<String, Expression>
+    pub kwargs: HashMap<String, Expression>,
 }
 
 /// A value expression.
diff --git a/tests/layouting.rs b/tests/layouting.rs
index 0174b097c..cb7b75ef8 100644
--- a/tests/layouting.rs
+++ b/tests/layouting.rs
@@ -1,15 +1,14 @@
 use std::fs::{self, File};
-use std::io::{Write, Read, BufWriter};
+use std::io::{BufWriter, Read, Write};
 use std::process::Command;
 
-use typst::Typesetter;
+use typst::export::pdf::PdfExporter;
 use typst::layout::LayoutAction;
 use typst::toddle::query::FileSystemFontProvider;
-use typst::export::pdf::PdfExporter;
+use typst::Typesetter;
 
 const CACHE_DIR: &str = "test-cache";
 
-
 fn main() {
     let mut perfect_match = false;
     let mut filter = Vec::new();
@@ -31,9 +30,7 @@ fn main() {
     for entry in fs::read_dir("tests/layouts/").unwrap() {
         let path = entry.unwrap().path();
 
-        let name = path
-            .file_stem().unwrap()
-            .to_str().unwrap();
+        let name = path.file_stem().unwrap().to_str().unwrap();
 
         let matches = if perfect_match {
             filter.iter().any(|pattern| name == pattern)