Remove double border between gray blocks

app/assets/stylesheets/framework/blocks.scss

@@ -114,3 +114,7 @@
     right: 10px;
   }
 }
+
+.block-connector {
+  margin-top: -1px;
+}

app/views/projects/commit/show.html.haml

 - page_title "#{@commit.title} (#{@commit.short_id})", "Commits"
 = render "projects/commits/header_title"
 = render "commit_box"
-= render "ci_menu" if @ci_commit
+- if @ci_commit
+  = render "ci_menu"
+- else
+  %div.block-connector
 = render "projects/diffs/diffs", diffs: @diffs, project: @project
 = render "projects/notes/notes_with_form"