Fix branch rendering

app/helpers/merge_requests_helper.rb

@@ -56,12 +56,14 @@ module MergeRequestsHelper
   end
 
   def source_branch_with_namespace(merge_request)
+    branch = link_to(merge_request.source_branch, namespace_project_commits_path(merge_request.source_project.namespace, merge_request.source_project, merge_request.source_branch))
+
     if merge_request.for_fork?
       namespace = link_to(merge_request.source_project_namespace,
         project_path(merge_request.source_project))
-      namespace + ":#{merge_request.source_branch}"
+      namespace + ":" + branch
     else
-      merge_request.source_branch
+      branch
     end
   end
 

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

@@ -26,7 +26,8 @@
               %li= link_to "Plain Diff",    merge_request_path(@merge_request, format: :diff)
       .normal
         %span Request to merge
-        = link_to source_branch_with_namespace(@merge_request), namespace_project_commits_path(@merge_request.source_project.namespace, @merge_request.source_project, @merge_request.source_branch), class: "label-branch"
+        %span.label-branch
+          = source_branch_with_namespace(@merge_request)
         %span into
         = link_to namespace_project_commits_path(@project.namespace, @project, @merge_request.target_branch), class: "label-branch" do
           = @merge_request.target_branch