Fix multiple commits shade overlapping vertical discussion line

app/assets/stylesheets/pages/notes.scss

@@ -371,10 +371,10 @@ $note-form-margin-left: 72px;
 
           &::after {
             content: '';
-            width: 100%;
             height: 70px;
             position: absolute;
-            left: 0;
+            left: $gl-padding-24;
+            right: 0;
             bottom: 0;
             background: linear-gradient(rgba($white-light, 0.1) -100px, $white-light 100%);
           }

changelogs/unreleased/fix-multiple-comments-shade-overlap.yml

+---
+title: Fix multiple commits shade overlapping vertical discussion line
+merge_request: 23515
+author:
+type: fixed