function replacerToRemovePaddingLines(_, trailingSpaces, indentSpaces) {
	return trailingSpaces + indentSpaces;
}
This returns the concatenation of the first 2 captured strings.
@param {string} _ Unused. Whole matched string.
@param {string} trailingSpaces The trailing spaces of the first line.
@param {string} indentSpaces The indentation spaces of the last line.
@returns {string} The concatenation of trailingSpaces and indentSpaces.
@private