fix typo in metal/live [ci skip]

actionpack/lib/action_controller/metal/live.rb

@@ -3,7 +3,7 @@
 
 module ActionController # :nodoc:
   # Mix this module in to your controller, and all actions in that controller
-  # will be able to stream data to the client as it's written.  For example:
+  # will be able to stream data to the client as it's written.
   #
   #   class MyController < ActionController::Base
   #     include ActionController::Live
@@ -27,7 +27,7 @@ module ActionController # :nodoc:
   # You *must* call close on your stream when you're finished, otherwise the
   # socket may be left open forever.
   #
-  # The final caveat is that you actions are executed in a separate thread than
+  # The final caveat is that your actions are executed in a separate thread than
   # the main thread. Make sure your actions are thread safe, and this shouldn't
   # be a problem (don't share state across threads, etc).
   module Live