Rust 1.95 (#55104)

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 #ISSUE

Release Notes:

- N/A

crates/multi_buffer/src/multi_buffer_tests.rs

@@ -2955,7 +2955,7 @@ impl ReferenceMultibuffer {
                     })
                     .collect::<Vec<_>>();
 
-            new_ranges.sort_by(|l, r| l.context.start.cmp(&r.context.start));
+            new_ranges.sort_by_key(|nr| nr.context.start);
 
             self.set_excerpts(
                 path.unwrap(),
@@ -3899,7 +3899,7 @@ fn mutate_excerpt_ranges(
     }
 
     existing_ranges.extend(ranges_to_add);
-    existing_ranges.sort_by(|l, r| l.start.cmp(&r.start));
+    existing_ranges.sort_by_key(|r| r.start);
 }
 
 fn check_multibuffer(