preserve_newlines always true

[shannonmoeller]

This line makes preserve_newlines always true:

preserve_newlines = options.preserve_newlines || true;

https://github.com/einars/js-beautify/blob/master/js/lib/beautify-html.js#L109

The default operator is a falsy check, not a undefined or null check, so preserve_newlines can never be set to false as it will default back to true. Should be something like this instead:

preserve_newlines = options.preserve_newlines;
if (options.preserve_newlines == null) {
    preserve_newlines = true;
}

[shannonmoeller]

Awesome. Thanks for the quick turnaround!