code: def StringEscape(self, string, match, **_):
      
      precondition.AssertType(string, Text)
      if match.group(1) in "'\"rnbt":
        self.string += compatibility.UnescapeString(string)
      else:
        self.string += string
docs: Escape backslashes found inside a string quote.
  
      Backslashes followed by anything other than ['"rnbt] will just be included
      in the string.
  
      Args:
         string: The string that matched.
         match: The match object (m.group(1) is the escaped code)