Out of range index error

[hodjat91]

Hi,

I think there is an "out of range IndexError" in the "bin_array" class inside coverage.py file: line 278:
self.nbins = -1 if len(nbins) == 0 else nbins[1]

I believe it should be nbins[0]. Please correct me if I'm missing something here.

Thanks

[mballance]

Good catch, Hodjat! You're correct about the index being incorrect. I've added a test to show the error, as well as a fix (2f6a5bd).
By the way, I'm very much open to PRs -- whether for something obvious like this or something more complex.