Fix a few typos. [ci skip]

actionpack/lib/action_controller/metal/force_ssl.rb

@@ -48,7 +48,7 @@ module ClassMethods
       # You can pass any of the following options to affect the redirect status and response
       # * <tt>status</tt>     - Redirect with a custom status (default is 301 Moved Permanently)
       # * <tt>flash</tt>      - Set a flash message when redirecting
-      # * <tt>alert</tt>      - Set a alert message when redirecting
+      # * <tt>alert</tt>      - Set an alert message when redirecting
       # * <tt>notice</tt>     - Set a notice message when redirecting
       #
       # ==== Action Options

actionview/lib/action_view/helpers/asset_url_helper.rb

@@ -143,9 +143,9 @@ def asset_path(source, options = {})
 
         "#{source}#{tail}"
       end
-      alias_method :path_to_asset, :asset_path # aliased to avoid conflicts with a asset_path named route
+      alias_method :path_to_asset, :asset_path # aliased to avoid conflicts with an asset_path named route
 
-      # Computes the full URL to a asset in the public directory. This
+      # Computes the full URL to an asset in the public directory. This
       # will use +asset_path+ internally, so most of their behaviors
       # will be the same.
       def asset_url(source, options = {})