sanitize (HTML::FullSanitizer)

    # File lib/action_controller/vendor/html-scanner/html/sanitizer.rb, line 29
        def sanitize(text, options = {})
          result = super
          # strip any comments, and if they have a newline at the end (ie. line with
          # only a comment) strip that too
          result.gsub!(/<!--(.*?)-->[\n]?/m, "") if result
          # Recurse - handle all dirty nested tags
          result == text ? result : sanitize(result, options)
        end