DOC: updates documentations Closes #21749
- [x] xref #21749 
- [x] tests added / passed
- [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them
- [ ] whatsnew entry

Hello @salomondush! 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 2021-08-16 18:33:32 UTC great does this close all of the items in the original issue? I only changed those in the directory ./pandas/util/testing.py. Others have remained the same.  thanks @salomondush happy to have a PR on other items in the original issue as well