Only make margin-auto on large screens for diff file header

app/assets/javascripts/diffs/constants.js

@@ -49,4 +49,4 @@ export const TYPE_KEY = 'type';
 export const LEFT_LINE_KEY = 'left';
 
 export const CENTERED_LIMITED_CONTAINER_CLASSES =
-  'container-limited limit-container-width mx-auto px-3';
+  'container-limited limit-container-width mx-lg-auto px-3';

changelogs/unreleased/60304-long-file-names-in-mr-diffs-cause-horizontal-scrolling.yml

+---
+title: Fix long file header names bug in diffs
+merge_request: 27233
+author:
+type: fixed