func (l *Lexer) acceptRun(valid []byte) {
	for bytes.IndexByte(valid, l.next()) >= 0 {
	}
	l.backup()
}
// acceptRun consumes a run of bytes from the valid set.
acceptRun consumes a run of bytes from the valid set.
// acceptRun consumes a run of bytes from the valid set .
func (l *Lexer) acceptRun(valid []byte) {
	for bytes.IndexByte(valid, l.next()) >= 0 {
	}
	l.backup()
}
func ( l * Lexer ) acceptRun ( valid [ ] byte ) { for bytes . IndexByte ( valid , l . next ( ) ) >= 0 { } l . backup ( ) }
acceptRun consumes a run of bytes from the valid set.
acceptRun consumes a run of bytes from the valid set .