Adds new line in the end of the file

app/views/projects/merge_requests/widget/_heading.html.haml

@@ -59,4 +59,4 @@
               = icon('external-link', text: "View on #{external_url.gsub(/\A.*?:\/\//, '')}", right: true)
         %span.close-env-container
           = link_to '#', class: 'close-evn-link' do
-            = icon('stop-circle-o', text: 'Stop environment')
\ No newline at end of file
+            = icon('stop-circle-o', text: 'Stop environment')