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// ToLF() replace CR and CR/LF to LF.
func ToLF(argv0 *string) *string {
	// @param    [*string] argv0  Text including CR or CR/LF
	// @return   [*string]        LF converted text
	if len(*argv0) == 0 { return argv0 }

	replaceset := [...]string { "\r\n", "\r" }
	lfreplaced := ""

	for _, e := range replaceset {
		// Convert CRLF and CR to LF
		if !strings.Contains(*argv0, e) { continue }
		lfreplaced = strings.Replace(*argv0, e, "\n", -1)
	}
	if len(lfreplaced) == 0 { return argv0 }

	return &lfreplaced
}