Convert tabs to spaces on indent

[mbarkhau]

Hi Jeff,

it seems that your mode doesn't always indent as I would expect.
Shouldn't it indent after "for", "if", etc. unless there is a "then" in the same line?

Thank you for this nice mode.
Manuel

[pickhardt]

This is a valid feature request.

To set expectations, you should know I'm not actively developing anything
for the module anymore. I'd be great if you could add it! If you look at
lines 243-249, you'll see how I indent after a function declaration arrow
(->). You'd want to do something similar.

    if ((current === '->' &&
              !state.lambda &&
              state.scopes[0].type == 'coffee' &&
              stream.peek() === '')
           || style === 'coffee-indent') {
        indent(stream, state);
    }

Also, for anyone reading this, CodeMirror itself has options to convert tabs
to spaces, called indentWithTabs (http://codemirror.net/manual.html). That
should be used with the CoffeeScript module as well.

[pickhardt]

Actually, I was wrong; indentWithTabs converts spaces to tabs. Looks like
CodeMirror converts tabs to spaces by default already.