diff --git a/crates/typst-layout/src/inline/line.rs b/crates/typst-layout/src/inline/line.rs
index 659d33f4a..6d0d463be 100644
--- a/crates/typst-layout/src/inline/line.rs
+++ b/crates/typst-layout/src/inline/line.rs
@@ -698,6 +698,10 @@ impl Debug for Items<'_> {
 }
 
 /// A reference to or a boxed item.
+///
+/// This is conceptually similar to a [`Cow<'a, Item<'a>>`][std::borrow::Cow],
+/// but we box owned items since an [`Item`] is much bigger than
+/// a box.
 pub enum ItemEntry<'a> {
     Ref(&'a Item<'a>),
     Box(Box<Item<'a>>),
diff --git a/crates/typst-library/src/model/bibliography.rs b/crates/typst-library/src/model/bibliography.rs
index a391e5804..4ea7b535d 100644
--- a/crates/typst-library/src/model/bibliography.rs
+++ b/crates/typst-library/src/model/bibliography.rs
@@ -571,7 +571,7 @@ impl Works {
 
 /// Context for generating the bibliography.
 struct Generator<'a> {
-    /// The routines that is used to evaluate mathematical material in citations.
+    /// The routines that are used to evaluate mathematical material in citations.
     routines: &'a Routines,
     /// The world that is used to evaluate mathematical material in citations.
     world: Tracked<'a, dyn World + 'a>,
@@ -588,7 +588,7 @@ struct Generator<'a> {
 
 /// Details about a group of merged citations. All citations are put into groups
 /// of adjacent ones (e.g., `@foo @bar` will merge into a group of length two).
-/// Even single citations will be put into groups of length ones.
+/// Even single citations will be put into groups of length one.
 struct GroupInfo {
     /// The group's location.
     location: Location,