public static void nl(String nl) {
        Formatting.nl  = nl;
        Formatting.dnl = nl + nl;
    }
Sets which new-line-character to use. Should be set before any code
generation happens for indentation to work as expected.

@param nl The new character to use.
common-parent/codegen/src/main/java/com/speedment/common/codegen/util/Formatting.java