STY: F-strings and repr
- [ ] ref #29886 and #29547
- [ ] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

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











There are currently no PEP 8 issues detected in this Pull Request. Cheers! :beers: 

##### Comment last updated at 2019-11-30 21:34:46 UTC thanks @MomIsBestFriend 

if you would add a code-check for using ``r!`` would be great! > thanks @MomIsBestFriend
> 
> if you would add a code-check for using `r!` would be great!

Sure I'll just eliminate every occurrence of ```!r``` first thanks @MomIsBestFriend  :)