Remove unnecessary string interpolation.

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

@@ -15,5 +15,5 @@
               = check_box_tag :filter_ref, 1, @options[:filter_ref]
               %span Begin with the selected commit
 
-    .network-graph{ data: { url: "#{@url}", commit_url: "#{@commit_url}", ref: "#{@ref}", commit_id: "#{@commit.id}" } }
+    .network-graph{ data: { url: @url, commit_url: @commit_url, ref: @ref, commit_id: @commit.id } }
       = spinner nil, true