diff --git a/src/bin/main.rs b/src/bin/main.rs
index b678cda9e..5ae20f4a6 100644
--- a/src/bin/main.rs
+++ b/src/bin/main.rs
@@ -29,7 +29,9 @@ fn run() -> Result<(), Box<dyn Error>> {
     // 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 base = source_path.parent().ok_or_else(|| "missing destation folder")?;
+
         base.join(format!("{}.pdf", stem.to_string_lossy()))
     } else {
         PathBuf::from(&args[2])
diff --git a/src/func.rs b/src/func.rs
index 14dd5bebc..cbe7a31ac 100644
--- a/src/func.rs
+++ b/src/func.rs
@@ -5,6 +5,7 @@ use std::collections::HashMap;
 use std::fmt::{self, Debug, Formatter};
 
 use toddle::query::FontClass;
+
 use crate::layout::{Layout, MultiLayout , LayoutContext, LayoutResult};
 use crate::parsing::{ParseContext, ParseResult};
 use crate::syntax::{SyntaxTree, FuncHeader};
diff --git a/src/layout/actions.rs b/src/layout/actions.rs
index 3eb85e50c..069c3f7c9 100644
--- a/src/layout/actions.rs
+++ b/src/layout/actions.rs
@@ -1,7 +1,8 @@
-//! Drawing and cofiguration actions used by layouts.
+//! Drawing and cofiguration actions composing layouts.
 
 use std::fmt::{self, Display, Formatter};
 use std::io::{self, Write};
+
 use crate::size::Size2D;
 use super::Layout;
 use LayoutAction::*;
diff --git a/src/layout/flex.rs b/src/layout/flex.rs
index 68d390040..704281d3b 100644
--- a/src/layout/flex.rs
+++ b/src/layout/flex.rs
@@ -1,10 +1,6 @@
-//! Flexible and lazy layouting of boxes.
-
-use crate::size::{Size, Size2D};
 use super::*;
 
 
-
 /// Finishes a flex layout by justifying the positions of the individual boxes.
 #[derive(Debug)]
 pub struct FlexLayouter {
diff --git a/src/layout/mod.rs b/src/layout/mod.rs
index 1bd11e148..c8d101414 100644
--- a/src/layout/mod.rs
+++ b/src/layout/mod.rs
@@ -1,4 +1,4 @@
-//! The layouting engine.
+//! The core layouting engine.
 
 use std::borrow::Cow;
 use std::io::{self, Write};
@@ -12,7 +12,6 @@ use crate::size::{Size, Size2D, SizeBox};
 use crate::syntax::{SyntaxTree, Node, FuncCall};
 use crate::style::TextStyle;
 
-
 mod text;
 mod stacked;
 mod flex;
diff --git a/src/layout/text.rs b/src/layout/text.rs
index 6cbe3b8e6..cf2580294 100644
--- a/src/layout/text.rs
+++ b/src/layout/text.rs
@@ -1,5 +1,3 @@
-//! Layouting of text into boxes.
-
 use toddle::query::{FontQuery, SharedFontLoader};
 use toddle::tables::{Header, CharMap, HorizontalMetrics};
 
diff --git a/src/lib.rs b/src/lib.rs
index b622d924d..00ed9e298 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -2,12 +2,11 @@
 //!
 //! # Steps
 //! - **Parsing:** The parsing step first transforms a plain string into an [iterator of
-//!   tokens](crate::parsing::Tokens). Then the [parser](crate::parsing::Parser) operates on that to
-//!   construct a syntax tree. The structures describing the tree can be found in the [syntax]
-//!   module.
+//!   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 [doc] and [layout] modules. This
-//!   representation contains already the finished layout.
+//!   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_.
@@ -15,6 +14,7 @@
 pub extern crate toddle;
 
 use std::cell::RefCell;
+
 use toddle::query::{FontLoader, SharedFontLoader, FontProvider};
 
 use crate::func::Scope;
diff --git a/src/library/align.rs b/src/library/align.rs
index 099daf888..322a9efae 100644
--- a/src/library/align.rs
+++ b/src/library/align.rs
@@ -1,5 +1,3 @@
-//! Alignment function.
-
 use super::prelude::*;
 use crate::layout::Alignment;
 
diff --git a/src/library/styles.rs b/src/library/styles.rs
index 85ae47898..c588ac5e4 100644
--- a/src/library/styles.rs
+++ b/src/library/styles.rs
@@ -1,7 +1,6 @@
-//! Basic style functions: bold, italic, monospace.
+use toddle::query::FontClass;
 
 use super::prelude::*;
-use toddle::query::FontClass;
 
 
 macro_rules! style_func {
diff --git a/src/macros.rs b/src/macros.rs
index 6aab95cf5..831a37c8a 100644
--- a/src/macros.rs
+++ b/src/macros.rs
@@ -1,17 +1,10 @@
-//! Error handling.
-
 /// Create an error type.
 macro_rules! error_type {
-    (   // The variable used instead of self in functions
-        // followed by the error type things are happening on.
+    (
         $var:ident: $err:ident,
-        // Optionally the name of a result type to generate.
         $(res: $res:ident,)*
-        // A `Display` and `Debug` implementation.
         show: $f:ident => $show:expr,
-        // Optionally a `source` function for the `std::error::Error` trait.
         $(source: $source:expr,)*
-        // Any number of `From` implementations.
         $(from: ($from:path, $conv:expr),)*
     ) => {
         // Possibly create a result type.
diff --git a/src/parsing/mod.rs b/src/parsing/mod.rs
index 7d2c3d216..fa71270e0 100644
--- a/src/parsing/mod.rs
+++ b/src/parsing/mod.rs
@@ -1,6 +1,7 @@
-//! Parsing of source code into token streams an syntax trees.
+//! Parsing of source code into token streams and syntax trees.
 
 use std::collections::HashMap;
+
 use unicode_xid::UnicodeXID;
 
 use crate::func::{Function, Scope};
@@ -8,6 +9,7 @@ use crate::syntax::*;
 use crate::size::Size;
 
 mod tokens;
+
 pub use tokens::{tokenize, Tokens};
 
 
@@ -539,6 +541,7 @@ mod tests {
 
     /// Parse the basic cases.
     #[test]
+    #[rustfmt::skip]
     fn parse_base() {
         test("", tree! []);
         test("Hello World!", tree! [ T("Hello"), S, T("World!") ]);
@@ -546,6 +549,7 @@ mod tests {
 
     /// Test whether newlines generate the correct whitespace.
     #[test]
+    #[rustfmt::skip]
     fn parse_newlines_whitespace() {
         test("Hello\nWorld", tree! [ T("Hello"), S, T("World") ]);
         test("Hello \n World", tree! [ T("Hello"), S, T("World") ]);
@@ -558,6 +562,7 @@ mod tests {
 
     /// Parse things dealing with functions.
     #[test]
+    #[rustfmt::skip]
     fn parse_functions() {
         let mut scope = Scope::new();
         scope.add::<BodylessFn>("test");
@@ -590,6 +595,7 @@ mod tests {
 
     /// Parse functions with arguments.
     #[test]
+    #[rustfmt::skip]
     fn parse_function_args() {
         use Expression::{Number as N, Size as Z, Bool as B};
 
@@ -599,14 +605,16 @@ mod tests {
         fn I(string: &str) -> Expression { Expression::Ident(string.to_owned()) }
 
         fn func(name: &str, args: Vec<Expression>) -> SyntaxTree {
-            tree! [ F(FuncCall {
-                header: FuncHeader {
-                    name: name.to_string(),
-                    args,
-                    kwargs: HashMap::new(),
-                },
-                body: Box::new(BodylessFn)
-            }) ]
+            tree! [
+                F(FuncCall {
+                    header: FuncHeader {
+                        name: name.to_string(),
+                        args,
+                        kwargs: HashMap::new(),
+                    },
+                    body: Box::new(BodylessFn)
+                })
+            ]
         }
 
         let mut scope = Scope::new();
@@ -626,6 +634,7 @@ mod tests {
 
     /// Parse comments (line and block).
     #[test]
+    #[rustfmt::skip]
     fn parse_comments() {
         let mut scope = Scope::new();
         scope.add::<BodylessFn>("test");
@@ -641,6 +650,7 @@ mod tests {
 
     /// Test if escaped, but unbalanced parens are correctly parsed.
     #[test]
+    #[rustfmt::skip]
     fn parse_unbalanced_body_parens() {
         let mut scope = Scope::new();
         scope.add::<TreeFn>("code");
@@ -667,6 +677,7 @@ mod tests {
 
     /// Tests if the parser handles non-ASCII stuff correctly.
     #[test]
+    #[rustfmt::skip]
     fn parse_unicode() {
         let mut scope = Scope::new();
         scope.add::<BodylessFn>("func");
@@ -689,6 +700,7 @@ mod tests {
 
     /// Tests whether errors get reported correctly.
     #[test]
+    #[rustfmt::skip]
     fn parse_errors() {
         let mut scope = Scope::new();
         scope.add::<TreeFn>("hello");
diff --git a/src/parsing/tokens.rs b/src/parsing/tokens.rs
index 74b9c11cc..869e3821d 100644
--- a/src/parsing/tokens.rs
+++ b/src/parsing/tokens.rs
@@ -1,7 +1,7 @@
-//! Tokenization of text.
-
 use std::str::CharIndices;
+
 use smallvec::SmallVec;
+
 use crate::syntax::*;
 
 
@@ -350,6 +350,7 @@ mod tests {
 
     /// Tokenizes the basic building blocks.
     #[test]
+    #[rustfmt::skip]
     fn tokenize_base() {
         test("", vec![]);
         test("Hallo", vec![T("Hallo")]);
@@ -363,17 +364,20 @@ mod tests {
 
     /// This test looks if LF- and CRLF-style newlines get both identified correctly.
     #[test]
+    #[rustfmt::skip]
     fn tokenize_whitespace_newlines() {
         test(" \t", vec![S]);
-        test("First line\r\nSecond line\nThird line\n",
-             vec![T("First"), S, T("line"), N, T("Second"), S, T("line"), N,
-                  T("Third"), S, T("line"), N]);
+        test("First line\r\nSecond line\nThird line\n", vec![
+            T("First"), S, T("line"), N, T("Second"), S, T("line"), N,
+            T("Third"), S, T("line"), N
+        ]);
         test("Hello \n ", vec![T("Hello"), S, N, S]);
         test("Dense\nTimes", vec![T("Dense"), N, T("Times")]);
     }
 
     /// Tests if escaping with backslash works as it should.
     #[test]
+    #[rustfmt::skip]
     fn tokenize_escape() {
         test(r"\[", vec![T("[")]);
         test(r"\]", vec![T("]")]);
@@ -386,12 +390,14 @@ mod tests {
 
     /// Tests if escaped strings work.
     #[test]
+    #[rustfmt::skip]
     fn tokenize_quoted() {
         test(r#"[align: "hello\"world"]"#, vec![L, T("align"), C, S, Q(r#"hello\"world"#), R]);
     }
 
     /// Tokenizes some more realistic examples.
     #[test]
+    #[rustfmt::skip]
     fn tokenize_examples() {
         test(r"
             [function][
@@ -418,29 +424,30 @@ mod tests {
     /// This test checks whether the colon and equals symbols get parsed correctly depending on the
     /// context: Either in a function header or in a body.
     #[test]
+    #[rustfmt::skip]
     fn tokenize_symbols_context() {
-        test("[func: key=value][Answer: 7]",
-             vec![L, T("func"), C, S, T("key"), E, T("value"), R, L,
-                  T("Answer:"), S, T("7"), R]);
-        test("[[n: k=v]:x][:[=]]:=",
-             vec![L, L, T("n"), C, S, T("k"), E, T("v"), R, C, T("x"), R,
-                  L, T(":"), L, E, R, R, T(":=")]);
-        test("[hi: k=[func][body] v=1][hello]",
-            vec![L, T("hi"), C, S, T("k"), E, L, T("func"), R, L, T("body"), R, S,
-                 T("v"), E, T("1"), R, L, T("hello"), R]);
-        test("[func: __key__=value]",
-             vec![L, T("func"), C, S, T("__key__"), E, T("value"), R]);
-        test("The /*[*/ answer: 7.",
-            vec![T("The"), S, BC("["), S, T("answer:"), S, T("7.")]);
+        test("[func: key=value][Answer: 7]", vec![
+            L, T("func"), C, S, T("key"), E, T("value"), R, L,
+            T("Answer:"), S, T("7"), R
+        ]);
+        test("[[n: k=v]:x][:[=]]:=", vec![
+            L, L, T("n"), C, S, T("k"), E, T("v"), R, C, T("x"), R,
+            L, T(":"), L, E, R, R, T(":=")
+        ]);
+        test("[hi: k=[func][body] v=1][hello]", vec![
+            L, T("hi"), C, S, T("k"), E, L, T("func"), R, L, T("body"), R, S,
+            T("v"), E, T("1"), R, L, T("hello"), R
+        ]);
+        test("[func: __key__=value]", vec![L, T("func"), C, S, T("__key__"), E, T("value"), R]);
+        test("The /*[*/ answer: 7.", vec![T("The"), S, BC("["), S, T("answer:"), S, T("7.")]);
     }
 
     /// Test if block and line comments get tokenized as expected.
     #[test]
+    #[rustfmt::skip]
     fn tokenize_comments() {
-        test("These // Line comments.",
-            vec![T("These"), S, LC(" Line comments.")]);
-        test("This /* is */ a comment.",
-            vec![T("This"), S, BC(" is "), S, T("a"), S, T("comment.")]);
+        test("These // Line comments.", vec![T("These"), S, LC(" Line comments.")]);
+        test("This /* is */ a comment.", vec![T("This"), S, BC(" is "), S, T("a"), S, T("comment.")]);
         test("[Head/*of*/][Body]", vec![L, T("Head"), BC("of"), R, L, T("Body"), R]);
         test("/* Hey */ */", vec![BC(" Hey "), S, SS]);
         test("Hey\n// Yoo /*\n*/", vec![T("Hey"), N, LC(" Yoo /*"), N, SS]);
@@ -449,6 +456,7 @@ mod tests {
 
     /// This test has a special look at the underscore syntax.
     #[test]
+    #[rustfmt::skip]
     fn tokenize_underscores() {
         test("he_llo_world_ __ Now this_ is_ special!",
              vec![T("he"), TU, T("llo"), TU, T("world"), TU, S, TU, TU, S, T("Now"), S,
@@ -457,9 +465,9 @@ mod tests {
 
     /// This test is for checking if non-ASCII characters get parsed correctly.
     #[test]
+    #[rustfmt::skip]
     fn tokenize_unicode() {
-        test("[document][Hello 🌍!]",
-             vec![L, T("document"), R, L, T("Hello"), S, T("🌍!"), R]);
+        test("[document][Hello 🌍!]", vec![L, T("document"), R, L, T("Hello"), S, T("🌍!"), R]);
         test("[f]⺐.", vec![L, T("f"), R, T("⺐.")]);
     }
 }
diff --git a/src/size.rs b/src/size.rs
index b9db382e5..f2e44e47f 100644
--- a/src/size.rs
+++ b/src/size.rs
@@ -1,4 +1,4 @@
-//! General spacing types.
+//! Different-dimensional spacing types.
 
 use std::cmp::Ordering;
 use std::fmt::{self, Display, Formatter};
diff --git a/src/style.rs b/src/style.rs
index cd404dd29..b9c377905 100644
--- a/src/style.rs
+++ b/src/style.rs
@@ -1,6 +1,7 @@
-//! Styles for layouting.
+//! Layouting styles.
 
 use toddle::query::FontClass;
+
 use crate::size::{Size, Size2D, SizeBox};
 
 
diff --git a/src/syntax.rs b/src/syntax.rs
index ac40c5627..b21406420 100644
--- a/src/syntax.rs
+++ b/src/syntax.rs
@@ -2,6 +2,7 @@
 
 use std::collections::HashMap;
 use std::fmt::{self, Display, Formatter};
+
 use crate::func::Function;
 use crate::size::Size;