Be sure to pass through args to to_yaml

activesupport/lib/active_support/core_ext/string/output_safety.rb

@@ -93,8 +93,8 @@ def as_str
       ''.replace(self)
     end
 
-    def to_yaml
-      as_str.to_yaml
+    def to_yaml(*args)
+      as_str.to_yaml(*args)
     end
   end
 end

activesupport/test/core_ext/string_ext_test.rb

@@ -446,7 +446,7 @@ def to_s
   end
 
   test 'emits normal string yaml' do
-    assert_equal 'foo'.to_yaml, 'foo'.html_safe.to_yaml
+    assert_equal 'foo'.to_yaml, 'foo'.html_safe.to_yaml(:foo => 1)
   end
 end