[Flimm]

Python 3 does not allow you to mix spaces and tabs. I don't know if Coffeescript is similarly strict.

I guess you've developed a habit where you're completely OK with having incorrect indentation a lot of the time, whereas I can't stand it. Just because it's easier to read for you doesn't make it easier for everyone, especially beginners.

[vidarh]

I can't stand incorrect indentation either, but my experience is that it regularly happens anyway, and I'd rather not have that break my code.

And "incorrect indentation" has a very different meaning when the indentation is purely for presentation: As illustrated above, some people like to use the indentation to call out specific aspects of the code. That may be "incorrect" from Python perspective, but it is a way of visually providing additional information that is not available to you if you use a language that requires a specific indenting style.