[WIP] style NA in reprs
- [ ] closes #xxxx
- [ ] tests added / passed
- [ ] passes `black pandas`
- [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

Hello @TomAugspurger! Thanks for opening this PR. We checked the lines you've touched for [PEP 8](https://www.python.org/dev/peps/pep-0008) issues, and found:

































* In the file [`pandas/tests/arrays/test_integer.py`](https://github.com/pandas-dev/pandas/blob/c6d593f97e98b648a5d4416da7ef4207fd711860/pandas/tests/arrays/test_integer.py):

> [Line 109:89](https://github.com/pandas-dev/pandas/blob/c6d593f97e98b648a5d4416da7ef4207fd711860/pandas/tests/arrays/test_integer.py#L109): [E501](https://duckduckgo.com/?q=pep8%20E501) line too long (113 > 88 characters)
> [Line 115:89](https://github.com/pandas-dev/pandas/blob/c6d593f97e98b648a5d4416da7ef4207fd711860/pandas/tests/arrays/test_integer.py#L115): [E501](https://duckduckgo.com/?q=pep8%20E501) line too long (98 > 88 characters)
> [Line 119:89](https://github.com/pandas-dev/pandas/blob/c6d593f97e98b648a5d4416da7ef4207fd711860/pandas/tests/arrays/test_integer.py#L119): [E501](https://duckduckgo.com/?q=pep8%20E501) line too long (164 > 88 characters)







 FYI I just made a "Mothballed" label for temporarily closed PRs the author plans to return to I'll just close this. No plans to return any time soon.