Accept `var` as a variable name

[marcandre]

It's really a small thing, but given that var has no legitimate use in coffeescript, it would be nice to be able to use it as a variable name instead of giving a syntax error. CS could map it to _var (with a unique suffix if that is also used)

[jashkenas]

Thanks, but I don't think so.

[vendethiel]

We don't want to get in games with everything around us -- We'd lose.
See #2370 #1452 and others.

[marcandre]

@vendethiel Thanks for the reference, even if that was a wild request, with incompatibilities and unsolved issues, none of which I can see in my request.

[vendethiel]

Indeed. A more appropriate one if #1452.

[marcandre]

Thanks @vendethiel, I get it now.

Sorry for the noise then.