prow/plugins/label/label.go
func getLabelsFromREMatches(matches [][]string) (labels []string) {
	for _, match := range matches {
		for _, label := range strings.Split(match[0], " ")[1:] {
			label = strings.ToLower(match[1] + "/" + strings.TrimSpace(label))
			labels = append(labels, label)
		}
	}
	return
}
func getLabelsFromREMatches(matches [][]string) (labels []string) {
	for _, match := range matches {
		for _, label := range strings.Split(match[0], " ")[1:] {
			label = strings.ToLower(match[1] + "/" + strings.TrimSpace(label))
			labels = append(labels, label)
		}
	}
	return
}
// Get Labels from Regexp matches