line2Length := len(fmt.Sprintf(msgLine2Fmt, updateString))

	// Populate lines with color coding.
	line1InColor := fmt.Sprintf(msgLine1Fmt, color.YellowBold(newerThan))
	line2InColor := fmt.Sprintf(msgLine2Fmt, color.CyanBold(updateString))

	// calculate the rectangular box size.
	maxContentWidth := max(line1Length, line2Length)

	// termWidth is set to a default one to use when we are
	// not able to calculate terminal width via OS syscalls

	for i, testCase := range testCases {
		output := prepareUpdateMessage(testCase.dlURL, testCase.older)
		line1 := fmt.Sprintf("%s %s", plainMsg, color.YellowBold(testCase.expectedSubStr))
		line2 := fmt.Sprintf("Update: %s", color.CyanBold(testCase.dlURL))
		// Uncomment below to see message appearance:
		// fmt.Println(output)
		switch {
		case testCase.dlURL == "" && output != "":