code: func (p *OpenMetricsParser) Help() ([]byte, []byte) {
  	m := p.l.b[p.offsets[0]:p.offsets[1]]
  
  	// Replacer causes allocations. Replace only when necessary.
  	if strings.IndexByte(yoloString(p.text), byte('\\')) >= 0 {
  		// OpenMetrics always uses the Prometheus format label value escaping.
  		return m, []byte(lvalReplacer.Replace(string(p.text)))
  	}
  	return m, p.text
  }
docs: // Help returns the metric name and help text in the current entry.
  // Must only be called after Next returned a help entry.
  // The returned byte slices become invalid after the next call to Next.