Merge pull request #22634 from arunagw/api-doc-for-actioncable

Generate API doc for actioncable

railties/lib/rails/api/task.rb

@@ -57,6 +57,13 @@ class Task < RDoc::Task
           )
         },
 
+        'actioncable' => {
+          :include => %w(
+            README.md
+            lib/action_cable/**/*.rb
+          )
+        },
+
         'railties' => {
           :include => %w(
             README.rdoc