git_graph: Fix pluralization of "Changed Files" in commit details (#54284)

galuis116 and Kunall Banerjee created 3 weeks ago

Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [x] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [x] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Closes #54283 

Release Notes:

- Fixed: Git graph commit detail header now uses “1 Changed File” when
exactly one file changed, and “N Changed Files” otherwise, instead of
always saying “Changed Files”.

---------

Co-authored-by: Kunall Banerjee <[e-mail]>

Change summary

crates/git_graph/src/git_graph.rs | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)

Detailed changes

crates/git_graph/src/git_graph.rs

@@ -2100,9 +2100,17 @@ impl GitGraph {
                             .w_full()
                             .justify_between()
                             .child(
-                                Label::new(format!("{} Changed Files", changed_files_count))
-                                    .size(LabelSize::Small)
-                                    .color(Color::Muted),
+                                Label::new(format!(
+                                    "{} Changed {}",
+                                    changed_files_count,
+                                    if changed_files_count == 1 {
+                                        "File"
+                                    } else {
+                                        "Files"
+                                    }
+                                ))
+                                .size(LabelSize::Small)
+                                .color(Color::Muted),
                             )
                             .child(DiffStat::new(
                                 "commit-diff-stat",