Move editor paths to helper

app/helpers/blob_helper.rb

@@ -217,4 +217,12 @@ module BlobHelper
   def gitlab_ci_ymls
     @gitlab_ci_ymls ||= Gitlab::Template::GitlabCiYmlTemplate.dropdown_names
   end
+
+  def blob_editor_paths
+    {
+      'relative-url-root' => Rails.application.config.relative_url_root,
+      'assets-prefix' => Gitlab::Application.config.assets.prefix,
+      'blob-language' => @blob && @blob.language.try(:ace_mode)
+    }
+  end
 end

app/views/projects/blob/edit.html.haml

@@ -19,7 +19,7 @@
       = link_to '#preview', 'data-preview-url' => namespace_project_preview_blob_path(@project.namespace, @project, @id) do
         = editing_preview_title(@blob.name)
 
-  = form_tag(namespace_project_update_blob_path(@project.namespace, @project, @id), method: :put, class: 'form-horizontal js-quick-submit js-requires-input js-edit-blob-form', data: {'relative-url-root' => "#{Rails.application.config.relative_url_root}", 'assets-prefix' => "#{Gitlab::Application.config.assets.prefix}", 'blob-language' => "#{@blob.language.try(:ace_mode)}" }) do
+  = form_tag(namespace_project_update_blob_path(@project.namespace, @project, @id), method: :put, class: 'form-horizontal js-quick-submit js-requires-input js-edit-blob-form', data: blob_editor_paths) do
     = render 'projects/blob/editor', ref: @ref, path: @path, blob_data: @blob.data
     = render 'shared/new_commit_form', placeholder: "Update #{@blob.name}"
     = hidden_field_tag 'last_commit_sha', @last_commit_sha

app/views/projects/blob/new.html.haml

@@ -7,7 +7,7 @@
   New File
 
 .file-editor
-  = form_tag(namespace_project_create_blob_path(@project.namespace, @project, @id), method: :post, class: 'form-horizontal js-edit-blob-form js-new-blob-form js-quick-submit js-requires-input', data: {'relative-url-root' => "#{Rails.application.config.relative_url_root}", 'assets-prefix' => "#{Gitlab::Application.config.assets.prefix}" }) do
+  = form_tag(namespace_project_create_blob_path(@project.namespace, @project, @id), method: :post, class: 'form-horizontal js-edit-blob-form js-new-blob-form js-quick-submit js-requires-input', data: blob_editor_paths) do
     = render 'projects/blob/editor', ref: @ref
     = render 'shared/new_commit_form', placeholder: "Add new file"