code: func (fp *formatParser) freshNext(i int, r rune) error {
  	fp.start = i
  	fp.code = (*formatParser).staticCode
  	fp.next = (*formatParser).staticNext
  	fp.end = (*formatParser).staticEnd
  	return nil
  }
docs: // Called when the parser is not currently parsing a static string and the next
  // character in the format string is not a '%'.