fixup! Add word-wrap support, with wrap length provided by the user

only calculate the wrapped line padding once per wrap call

help.go

@@ -386,12 +386,14 @@ func wrap(input string, offset int, wrapAt int) string {
 
 	lines := strings.Split(input, "\n")
 
+	padding := strings.Repeat(" ", offset)
+
 	for i, line := range lines {
 		if i != 0 {
-			sb.WriteString(strings.Repeat(" ", offset))
+			sb.WriteString(padding)
 		}
 
-		sb.WriteString(wrapLine(line, offset, wrapAt))
+		sb.WriteString(wrapLine(line, offset, wrapAt, padding))
 
 		if i != len(lines)-1 {
 			sb.WriteString("\n")
@@ -401,7 +403,7 @@ func wrap(input string, offset int, wrapAt int) string {
 	return sb.String()
 }
 
-func wrapLine(input string, offset int, wrapAt int) string {
+func wrapLine(input string, offset int, wrapAt int, padding string) string {
 	if wrapAt <= offset || len(input) <= wrapAt-offset {
 		return input
 	}
@@ -416,7 +418,7 @@ func wrapLine(input string, offset int, wrapAt int) string {
 	spaceLeft := lineWidth - len(wrapped)
 	for _, word := range words[1:] {
 		if len(word)+1 > spaceLeft {
-			wrapped += "\n" + strings.Repeat(" ", offset) + word
+			wrapped += "\n" + padding + word
 			spaceLeft = lineWidth - len(word)
 		} else {
 			wrapped += " " + word