diff --git a/app/helpers/diff_helper.rb b/app/helpers/diff_helper.rb
index cea18e7c0826b76acb85af120a797c440209aace..d76db867c5a617909a721aefecb82f2f7e8e531e 100644
--- a/app/helpers/diff_helper.rb
+++ b/app/helpers/diff_helper.rb
@@ -137,7 +137,7 @@ module DiffHelper
     # Always use HTML to handle case where JSON diff rendered this button
     params_copy.delete(:format)
 
-    link_to url_for(params_copy), id: "#{name}-diff-btn", class: (selected ? 'btn active' : 'btn'), data: {view_type: name} do
+    link_to url_for(params_copy), id: "#{name}-diff-btn", class: (selected ? 'btn active' : 'btn'), data: { view_type: name } do
       title
     end
   end