function createReplacement( comment, flg ) {
	if ( flg ) {
		return replace( comment, RE_DECIMAL, '$1.0$2' );
	}
	return replace( comment, RE_DECIMAL, '$1$2' );
}
Creates a replacement string for the given return annotation.

@private
@param {string} comment - return annotation
@param {boolean} flg - boolean indicating whether annotation must include decimal point
@returns {string} fixed return annotation