Typo fixes action pack.

actionpack/lib/action_controller/metal/exceptions.rb

@@ -52,7 +52,7 @@ module ActionController
   end
 
   # Raised when a nested respond_to is triggered and the content types of each
-  # are incompatible. For exampe:
+  # are incompatible. For example:
   #
   #  respond_to do |outer_type|
   #    outer_type.js do

actionpack/lib/action_controller/metal/strong_parameters.rb

@@ -795,7 +795,7 @@ module ActionController
         @permitted  = coder.map["ivars"][:@permitted]
       when "!ruby/object:ActionController::Parameters"
         # YAML's Object format. Only needed because of the format
-        # backwardscompability above, otherwise equivalent to YAML's initialization.
+        # backwards compatibility above, otherwise equivalent to YAML's initialization.
         @parameters, @permitted = coder.map["parameters"], coder.map["permitted"]
       end
     end