fix minor spelling mistakes in comments

actionpack/lib/action_controller/metal/force_ssl.rb

@@ -1,12 +1,12 @@
 module ActionController
-  # This module provides a method which will redirects browser to use HTTPS
+  # This module provides a method which will redirect browser to use HTTPS
   # protocol. This will ensure that user's sensitive information will be
   # transferred safely over the internet. You _should_ always force browser
   # to use HTTPS when you're transferring sensitive information such as
   # user authentication, account information, or credit card information.
   #
-  # Note that if you really concern about your application safety, you might
-  # consider using +config.force_ssl+ in your configuration config file instead.
+  # Note that if you are really concerned about your application security,
+  # you might consider using +config.force_ssl+ in your config file instead.
   # That will ensure all the data transferred via HTTPS protocol and prevent
   # user from getting session hijacked when accessing the site under unsecured
   # HTTP protocol.