change the link color of the target branch in a merge rquest

app/views/projects/merge_requests/_show.html.haml

@@ -31,7 +31,8 @@
         %span Request to merge
         %span.label-branch= source_branch_with_namespace(@merge_request)
         %span into
-        = link_to @merge_request.target_branch, namespace_project_commits_path(@project.namespace, @project, @merge_request.target_branch), class: "label-branch"
+        %span.label-branch
+          = link_to @merge_request.target_branch, namespace_project_commits_path(@project.namespace, @project, @merge_request.target_branch)
         - if @merge_request.open? && @merge_request.diverged_from_target_branch?
           %span (#{pluralize(@merge_request.diverged_commits_count, 'commit')} behind)