diff --git a/src/git/diff.rs b/src/git/diff.rs
index 9c2dae5..657bb79 100644
--- a/src/git/diff.rs
+++ b/src/git/diff.rs
@@ -11,7 +11,7 @@ pub enum LineKind {
     Removed,
 }
 
-/// A line of a diff: its kind, its numbers in the old and new text from one, its text, and the words that changed.
+/// A diff line: kind, numbers from one, text, changed words.
 #[derive(Clone, Debug, PartialEq)]
 pub struct DiffLine {
     pub kind: LineKind,
@@ -21,7 +21,7 @@ pub struct DiffLine {
     pub words: Vec<Range<usize>>,
 }
 
-/// A stretch of a diff: changed lines in their context, or unchanged lines folded away between.
+/// A hunk of changes in context, or folded unchanged lines.
 #[derive(Clone, Debug, PartialEq)]
 pub enum Stretch {
     Hunk {
@@ -42,7 +42,7 @@ fn same(text: &str, old: usize, new: usize) -> DiffLine {
     }
 }
 
-/// `old` against `new` line by line: hunks with `context` lines around each change, the rest folded.
+/// `old` against `new`, `context` lines per hunk, the rest folded.
 pub fn diff(old: &str, new: &str, context: usize) -> Vec<Stretch> {
     let diff = TextDiff::from_lines(old, new);
     let (olds, news): (Vec<&str>, Vec<&str>) = (
@@ -197,7 +197,7 @@ pub fn mark_words(lines: &mut [DiffLine]) {
     }
 }
 
-/// The numbers a side-by-side row shows: the old file's on the left, the new file's on the right.
+/// A side-by-side row's numbers: old left, new right.
 pub(crate) fn side_numbers(
     left: Option<&DiffLine>,
     right: Option<&DiffLine>,
diff --git a/src/git/tests.rs b/src/git/tests.rs
index b5466b6..c0db129 100644
--- a/src/git/tests.rs
+++ b/src/git/tests.rs
@@ -6,7 +6,7 @@ use gpui::{
 use super::DiffViewer;
 use crate::{forms, primitives::FocusNext, theme::Theme};
 
-/// A diff whose first stretch folds, and the folds asked open.
+/// A diff whose first stretch folds, and folds asked open.
 struct Folded {
     opened: Vec<usize>,
 }
@@ -51,7 +51,7 @@ fn a_fold_opens_from_the_keyboard(cx: &mut TestAppContext) {
     assert_eq!(view.read_with(cx, |folded, _| folded.opened.clone()), [0]);
 }
 
-/// A blame from before the file changed: an owner too few, and one past the blames.
+/// A blame older than its code: owners short and past.
 struct Behind;
 
 impl Render for Behind {
diff --git a/src/git/viewer.rs b/src/git/viewer.rs
index 04f4a8a..ae1a6ae 100644
--- a/src/git/viewer.rs
+++ b/src/git/viewer.rs
@@ -33,7 +33,7 @@ type OnIndex = Rc<dyn Fn(usize, &mut Window, &mut App)>;
 type OnLayout = Rc<dyn Fn(DiffLayout, &mut Window, &mut App)>;
 type OnLine = Rc<dyn Fn(Place, bool, &mut Window, &mut App)>;
 
-/// One file's changes: each change in its context with old and new numbers and its changed words marked, the stretches between folded until pressed; unified or side by side. Long diffs draw only the rows in view; it fills its box.
+/// One file's changes, unified or side by side; fills its box.
 #[derive(IntoElement)]
 pub struct DiffViewer {
     id: ElementId,
@@ -123,7 +123,7 @@ impl DiffViewer {
         self
     }
 
-    /// Leaves the file's header, its path, counts and layout, to the owner, as a change card draws it.
+    /// Leaves the header, path, counts and layout, to the owner.
     pub fn headless(mut self) -> Self {
         self.headless = true;
         self
@@ -134,7 +134,7 @@ impl DiffViewer {
         self
     }
 
-    /// Folded stretches shown in full, by their place among the stretches.
+    /// Folded stretches shown in full, by their place.
     pub fn open(mut self, stretches: impl IntoIterator<Item = usize>) -> Self {
         self.open = stretches.into_iter().collect();
         self
diff --git a/src/i18n/builtin.rs b/src/i18n/builtin.rs
index d6d3c7d..61d88c7 100644
--- a/src/i18n/builtin.rs
+++ b/src/i18n/builtin.rs
@@ -1,6 +1,6 @@
-//! Component copy in English and Chinese; `text` reads it when the app's catalogs lack the key.
+//! Component copy in English and Chinese, the apps' fallback.
 
-/// English, the canonical set; zh-CN holds the same keys, a test keeps parity.
+/// English, the canonical set; zh-CN mirrors its keys.
 const EN: &[(&str, &str)] = &[
     ("palette.command.placeholder", "Type a command"),
     ("palette.command.empty", "No matching commands"),
@@ -170,7 +170,7 @@ const ZH_CN: &[(&str, &str)] = &[
     ("git.commit.amend", "修改最近一次提交"),
 ];
 
-/// Ely's own message for `key` in `locale`, English for a locale Ely does not ship; fails on an unknown key.
+/// Ely's message for `key`; English if unshipped, fails if unknown.
 pub(crate) fn builtin(locale: &str, key: &str) -> &'static str {
     let table = if locale == "zh-CN" { ZH_CN } else { EN };
     table