If we doesn't use a relative url we have this:
<pre>gon.relative_url_root=""</pre>
Else <pre>gon.relative_url_root="/gitlab"</pre>
Gitlab::Application.config.assets.prefix contains:
<pre>/assets</pre>
= link_to "Cancel", project_blob_path(@project, @id), class: "btn btn-cancel", confirm: leave_edit_message
:javascript
- ace.config.set("modePath", "#{Gitlab::Application.config.assets.prefix}/ace-src-noconflict")
+ ace.config.set("modePath", gon.relative_url_root + "#{Gitlab::Application.config.assets.prefix}/ace-src-noconflict")
var ace_mode = "#{@blob.language.try(:ace_mode)}";
var editor = ace.edit("editor");
if (ace_mode) {