Updated description of cut and qcut
- [ ] closes #xxxx
- [ ] tests added / passed
- [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them
- [x] A colleague of mine complained about the quality of the `cut` description. I took a chance to update the description of `cut` and `qcut`. If there are some suggestions to improve the description - please let me know.

Hello @Ceay1! 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 2021-02-18 00:02:27 UTC I believe I have addressed all the suggestions. Please let me know if something else needs to be done on my end. >  A colleague of mine complained about the quality of the cut description. I took a chance to update the description of cut and qcut. If there are some suggestions to improve the description - please let me know.

would more examples help aside from the updated descriptions? 
can you add a link to wikipedia entries? https://en.wikipedia.org/wiki/Discretization_of_continuous_features or similar might be useful to point to. @jreback , thank you for the feedback. I added a reference to wiki and dropped series. 

Agree that adding examples would help. There are a couple of open issues on qcut. I would like to first update high-level functions description, then (hopefully) look at some of the open issues, and after that suggest appropriate examples. Hope this plan of starting with the description works with you. sounds good will look soon This pull request is stale because it has been open for thirty days with no activity. Please update or respond to this comment if you're still interested in working on this. > This pull request is stale because it has been open for thirty days with no activity. Please update or respond to this comment if you're still interested in working on this.

This pull request is limited in scope to updated descriptions of qcut and cut. All comments on the description of the cut and qcut have been addressed. Further comments (eg wrt additional examples) will be addressed in subsequent pull requests.

 > sounds good will look soon

ping @jreback @Ceay1 can you please open a new PR that  targets master, instead of the branch `1.2.x`, so we can merge? Closing this one.