minor: point to the right test suite location

Author: azul

actionview/test/template/sanitize_helper_test.rb

@@ -1,6 +1,6 @@
 require 'abstract_unit'
 
-# The exhaustive tests are in test/controller/html/sanitizer_test.rb.
+# The exhaustive tests are in  test/template/html-scanner/sanitizer_test.rb
 # This tests the that the helpers hook up correctly to the sanitizer classes.
 class SanitizeHelperTest < ActionView::TestCase
   tests ActionView::Helpers::SanitizeHelper