Clean up trailing spaces.
Add `*args` to `super` call, for ruby 1.9.1

As per https://github.com/greatseth/labeling-form-helper/issues/1
Merge branch 'super-fix' of https://github.com/taktran/labeling-form-helper into taktran-super-fix

Conflicts:
	lib/labeling_form_builder.rb