in section 4.1 acts_as_yaffle_test was incorrectly failing due to assertion...

in section 4.1 acts_as_yaffle_test was incorrectly failing due to assertion incorrectly using symbol instead of string

guides/source/plugins.textile

@@ -174,11 +174,11 @@ require 'test_helper'
 class ActsAsYaffleTest < Test::Unit::TestCase
 
   def test_a_hickwalls_yaffle_text_field_should_be_last_squawk
-    assert_equal :last_squawk, Hickwall.yaffle_text_field
+    assert_equal "last_squawk", Hickwall.yaffle_text_field
   end
 
   def test_a_wickwalls_yaffle_text_field_should_be_last_tweet
-    assert_equal :last_tweet, Wickwall.yaffle_text_field
+    assert_equal "last_tweet", Wickwall.yaffle_text_field
   end
 
 end