Use correct spelling for "more-itertools"

[sscherfke]

Correct the requirement more_itertools to more-itertools. Pip does not differentiate between - and _ but Conda does.

[edmorley]

I just spotted this too - this saved me opening a PR :-)

[coveralls]

Coverage increased (+0.05%) to 92.84% when pulling 9aa2a83 on sscherfke:more-itertools into 9326759 on pytest-dev:master.

[RonnyPfannschmidt]

strictly speaking this is a conda bug, but I'm more than happy to elevate it for users

thanks for sorting it out

[RonnyPfannschmidt]

also whops, my mistake, we should add a trivial changelog file - do you want to, or should we?

[sscherfke]

This is only a minor issue and I don’t need any credit for it and I wouldn’t even add a changelog entry for that. ;-)

[sscherfke]

Thx for merging it so quickly :)

[nicoddemus]

Thanks @sscherfke, I used the correct spelling when updating the conda-forge recipe and didn't even noticed it was wrong in setup.py:

https://github.com/conda-forge/pytest-feedstock/blob/7087d413e4283673385a44275b9cc6a247d60a4f/recipe/meta.yaml#L30