def optimize_quoted_uri_escapes!(escaped)
      escaped.gsub!('%3D', '=')
      escaped.gsub!('%3A', ':')
      escaped.gsub!('%2F', '/')
      escaped.gsub!('%27', "'")
      escaped.tr!('+', ' ')
    end
def optimize_quoted_uri_escapes!(escaped)
      escaped.gsub!('%3D', '=')
      escaped.gsub!('%3A', ':')
      escaped.gsub!('%2F', '/')
      escaped.gsub!('%27', "'")
      escaped.tr!('+', ' ')
    end
Un-escapes characters in the given URI-escaped string that do not need
 escaping in "-quoted data URIs.