Adjust line height of blame view line numbers

app/assets/stylesheets/framework/highlight.scss

@@ -42,7 +42,6 @@
     padding: 10px;
     text-align: right;
     float: left;
-    line-height: 1;
     a {
       font-family: $monospace-font;
@@ -69,3 +68,9 @@
     }
   }
 }
+
+// Vertically aligns <table> line numbers (eg. blame view)
+// see https://gitlab.com/gitlab-org/gitlab-ce/issues/54048
+td.line-numbers {
+  line-height: 1;
+}

changelogs/unreleased/51668-fix-line-numbers.yml

+---
+title: Adjust line-height of blame view line numbers
+merge_request:
+author:
+type: fixed