result = pattern.Expand(result, template, content, submatches)
	}
	fmt.Println(string(result))
	// Output:
	// option1=value1
	// option2=value2
	// option3=value3
}

func ExampleRegexp_ExpandString() {
	content := `
	# comment line
	option1: value1
	option2: value2

	# another comment line
	option3: value3
`

	// Regex pattern captures "key: value" pair from the content.