Trailing backslash in the ignore file is throwing a syntax error.

[wkozyra95]

import ignore from 'ignore'
ignore().add('test\\').ignores('test')

The above code will throw

SyntaxError: Invalid regular expression: /(?:^|\/)test\(?=$|\/$)/: Unmatched ')'

I'm not sure what the correct behavior should be according to standard, but it does not fail in git so I would also expect this case to be handled without throwing an error. For now I'm just handling that case by striping trailing '', before it's passed to ignore.

[kaelzhang]

I think test\\ is an invalid gitignore pattern, however it indicates a bug of node-ignore that node-ignore should not throw

But you should not strip trailing ' ' of gitignore patterns, and trailing whitespaces are already handled by node-ignore according to the gitignore spec