Added '(dev)' to the title in development mode (#2524)

* Added different title for dev

* Changed indentation

app/helpers/application_helper.rb

@@ -18,4 +18,8 @@ module ApplicationHelper
     env_suffix = Rails.env.production? ? '' : '-dev'
     asset_path "favicon#{env_suffix}.ico"
   end
+
+  def title
+    Rails.env.production? ? site_title : "#{site_title} (Dev)"
+  end
 end

app/views/layouts/application.html.haml

@@ -17,7 +17,7 @@
       - if content_for?(:page_title)
         = yield(:page_title)
         = ' - '
-      = site_title
+      = title
 
     = stylesheet_link_tag stylesheet_for_layout, media: 'all'
     = csrf_meta_tags