ActionController::Metal#to_rack converted to #to_a to match normal rack convention

actionpack/lib/action_controller/metal.rb

@@ -72,11 +72,11 @@ def location=(url)
     def call(name, env)
       @_env = env
       process(name)
-      to_rack
+      to_a
     end
 
     # :api: private
-    def to_rack
+    def to_a
       [status, headers, response_body]
     end
 

actionpack/lib/action_controller/metal/rack_convenience.rb

@@ -20,7 +20,7 @@ def params
     end
 
     # :api: private
-    def to_rack
+    def to_a
       @_response.prepare!
       @_response.to_a
     end