gradually moving documentation to new hash syntax

activerecord/test/cases/nested_attributes_test.rb

@@ -156,7 +156,7 @@ def test_has_many_association_updating_a_single_record
   end
 
   def test_reject_if_with_blank_nested_attributes_id
-    # When using a select list to choose an existing 'ship' id, with :include_blank => true
+    # When using a select list to choose an existing 'ship' id, with include_blank: true
     Pirate.accepts_nested_attributes_for :ship, :reject_if => proc {|attributes| attributes[:id].blank? }
 
     pirate = Pirate.new(:catchphrase => "Stop wastin' me time")

activerecord/test/cases/validations/i18n_validation_test.rb

@@ -43,7 +43,7 @@ def replied_topic
     [ "given option that is not reserved", {:format => "jpg"},            {:format => "jpg" }]
     # TODO Add :on case, but below doesn't work, because then the validation isn't run for some reason
     #      even when using .save instead .valid?
-    # [ "given on condition",     {:on => :save},                {}]
+    # [ "given on condition",     {on: :save},                {}]
   ]
 
   # validates_uniqueness_of w/ mocha