Fix image diff swipe handle offset to correctly align with the frame

app/assets/javascripts/commit/image_file.js

@@ -134,8 +134,9 @@
               width: maxWidth + 1,
               height: maxHeight + 2
             });
+            // Set swipeBar left position to match image frame
             $swipeBar.css({
-              left: 0
+              left: 1
             });
 
             wrapPadding = parseInt($swipeWrap.css('right').replace('px', ''), 10);

changelogs/unreleased/fix-image-diff-swipe-handle.yml

+---
+title: Fix image diff swipe handle offset to correctly align with the frame
+merge_request:
+author:
+type: fixed