Remove reference to unexistent methods and fix typo.

actionpack/lib/action_view/lookup_context.rb

@@ -112,7 +112,7 @@ def normalize_name(name, prefix) #:nodoc:
       end
 
       def default_handlers #:nodoc:
-        @detault_handlers ||= Template::Handlers.extensions
+        @default_handlers ||= Template::Handlers.extensions
       end
 
       def handlers_regexp #:nodoc:

activemodel/lib/active_model/validations.rb

@@ -112,7 +112,6 @@ def validates_each(*attr_names, &block)
       #     end
       #   end
       #
-      # This usage applies to +validate_on_create+ and +validate_on_update as well+.
       def validate(*args, &block)
         options = args.last
         if options.is_a?(Hash) && options.key?(:on)