Probable bug in \\z anchor matching

[lierdakil]

So, I've been looking over the source code, and I don't think that \\z anchor, defined at https://github.com/atom/first-mate/blob/master/src/pattern.coffee#L71 will ever match.

First of, shouldn't backslashes be escaped, i.e. '$(?!\\n)(?<!\\n)'?

Second, since at https://github.com/atom/first-mate/blob/master/src/rule.coffee#L56 newline is appended to all lines, this will never match, will it?

[lierdakil]

This apparently was fixed with #100. At least a quick test shows that \z anchor now matches end of document correctly.