func strings.TrimRight

3 uses

	strings (current package)
		strings.go#L1047: func TrimRight(s, cutset string) string {

	net/textproto
		reader.go#L302: 			messageBuilder.WriteString(strings.TrimRight(line, "\r\n"))

	text/template/parse
		lex.go#L302: 	return Pos(len(s) - len(strings.TrimRight(s, spaceChars)))

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