1 files changed, 3 insertions, 1 deletions
diff --git a/actionpack/lib/action_dispatch/http/mime_type.rb b/actionpack/lib/action_dispatch/http/mime_type.rb
index 58eb8d0baf..6b718e3682 100644
--- a/actionpack/lib/action_dispatch/http/mime_type.rb
+++ b/actionpack/lib/action_dispatch/http/mime_type.rb
@@ -278,6 +278,8 @@ module Mime
 
     def all?; false; end
 
+    # TODO Change this to private once we've dropped Ruby 2.2 support.
+    # Workaround for Ruby 2.2 "private attribute?" warning.
     protected
 
       attr_reader :string, :synonyms
@@ -295,7 +297,7 @@ module Mime
         end
       end
 
-      def respond_to_missing?(method, include_private = false) #:nodoc:
+      def respond_to_missing?(method, include_private = false)
         method.to_s.ends_with? "?"
       end
   end