Merge pull request #31145 from dwightwatson/feature/preview-sorting

Sort mailer previews alphabetically

actionmailer/lib/action_mailer/preview.rb

@@ -104,7 +104,7 @@ def preview_name
       private
         def load_previews
           if preview_path
-            Dir["#{preview_path}/**/*_preview.rb"].each { |file| require_dependency file }
+            Dir["#{preview_path}/**/*_preview.rb"].sort.each { |file| require_dependency file }
           end
         end