code: def _parse_data(self, line, old_data=""):
          
          log.debug("*** parse DATA: >>>%r<<< old data: >>>%r<<<", line, old_data)
          parts = self.regex_split_data.split(line, maxsplit=1)
          if len(parts) == 1:  # end
              return old_data + parts[0], None
  
          pre, match, post = parts
          log.debug("\tpre: >>>%r<<<", pre)
          pre = old_data + pre
          log.debug("\tmatch: >>>%r<<<", match)
          log.debug("\tpost: >>>%r<<<", post)
          if match == ":":
              return old_data, match + post
          elif match == '"':
              string_part, rest = self._parse_string(post)
              return self._parse_data(rest, old_data=pre + match + string_part)
  
          raise RuntimeError("Wrong Reg.Exp.? match is: %r" % match)
docs: Parse a DATA section until : or \n but exclude : in a string part.
          e.g.:
              10 DATA 1,"FOO:BAR",2:PRINT "NO DATA"