CR after line continuation backslash leads to syntax error

[provegard]

Just tried to migrate a project from the original compiler to redux. One of the errors I encountered is this:

angular.module("foobar", ["dep1", \
    "dep2"])

I get:

Syntax error on line 2, column 4: unexpected '(INDENT)' (\uEFEF)
1 : angular.module("foobar", ["dep1", \
2 :     "dep2"])
^ :~~~~^
3 :
4 :

The reason is that the backslash is followed by CRLF since I'm on Windows. The problem appears to be already in the preprocessor and I have a fix for it. I'll open a PR.

Note: I initially thought I'd hit #83, but this is slightly different and my fix certainly doesn't help that issue at all.

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