DOC: Delete more trailing blank lines in docstrings.
- [x] closes #23632
- [x] tests added / passed
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
Hello @douglatornell! Thanks for submitting the PR.

 - There are no PEP8 issues in the file [`pandas/core/arrays/categorical.py`](https://github.com/douglatornell/pandas/blob/864720adfd667a991077a91d99b9ea72334b056e/pandas/core/arrays/categorical.py) !

 - There are no PEP8 issues in the file [`pandas/core/arrays/datetimes.py`](https://github.com/douglatornell/pandas/blob/864720adfd667a991077a91d99b9ea72334b056e/pandas/core/arrays/datetimes.py) !

 - There are no PEP8 issues in the file [`pandas/core/generic.py`](https://github.com/douglatornell/pandas/blob/864720adfd667a991077a91d99b9ea72334b056e/pandas/core/generic.py) !

 - There are no PEP8 issues in the file [`pandas/core/indexing.py`](https://github.com/douglatornell/pandas/blob/864720adfd667a991077a91d99b9ea72334b056e/pandas/core/indexing.py) !

 - There are no PEP8 issues in the file [`pandas/core/strings.py`](https://github.com/douglatornell/pandas/blob/864720adfd667a991077a91d99b9ea72334b056e/pandas/core/strings.py) !

 - There are no PEP8 issues in the file [`pandas/core/window.py`](https://github.com/douglatornell/pandas/blob/864720adfd667a991077a91d99b9ea72334b056e/pandas/core/window.py) !

 - There are no PEP8 issues in the file [`pandas/plotting/_core.py`](https://github.com/douglatornell/pandas/blob/864720adfd667a991077a91d99b9ea72334b056e/pandas/plotting/_core.py) !

 # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/23698?src=pr&el=h1) Report
> Merging [#23698](https://codecov.io/gh/pandas-dev/pandas/pull/23698?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/b4b945adad587851d570e950d05a1da75c5dc76c?src=pr&el=desc) will **decrease** coverage by `<.01%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/23698/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/23698?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #23698      +/-   ##
==========================================
- Coverage   92.24%   92.24%   -0.01%     
==========================================
  Files         161      161              
  Lines       51339    51336       -3     
==========================================
- Hits        47360    47357       -3     
  Misses       3979     3979
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.64% <ø> (-0.01%)` | :arrow_down: |
| #single | `42.34% <ø> (ø)` | :arrow_up: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/23698?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/core/indexing.py](https://codecov.io/gh/pandas-dev/pandas/pull/23698/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvaW5kZXhpbmcucHk=) | `93.87% <ø> (ø)` | :arrow_up: |
| [pandas/core/window.py](https://codecov.io/gh/pandas-dev/pandas/pull/23698/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvd2luZG93LnB5) | `96.4% <ø> (ø)` | :arrow_up: |
| [pandas/core/arrays/categorical.py](https://codecov.io/gh/pandas-dev/pandas/pull/23698/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvYXJyYXlzL2NhdGVnb3JpY2FsLnB5) | `95.34% <ø> (ø)` | :arrow_up: |
| [pandas/plotting/\_core.py](https://codecov.io/gh/pandas-dev/pandas/pull/23698/diff?src=pr&el=tree#diff-cGFuZGFzL3Bsb3R0aW5nL19jb3JlLnB5) | `83.63% <ø> (ø)` | :arrow_up: |
| [pandas/core/arrays/datetimes.py](https://codecov.io/gh/pandas-dev/pandas/pull/23698/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvYXJyYXlzL2RhdGV0aW1lcy5weQ==) | `98.47% <ø> (ø)` | :arrow_up: |
| [pandas/core/generic.py](https://codecov.io/gh/pandas-dev/pandas/pull/23698/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZ2VuZXJpYy5weQ==) | `96.82% <ø> (ø)` | :arrow_up: |
| [pandas/core/strings.py](https://codecov.io/gh/pandas-dev/pandas/pull/23698/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvc3RyaW5ncy5weQ==) | `98.58% <ø> (ø)` | :arrow_up: |
| [pandas/io/formats/format.py](https://codecov.io/gh/pandas-dev/pandas/pull/23698/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL2Zvcm1hdHMvZm9ybWF0LnB5) | `97.88% <0%> (-0.01%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/23698?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/23698?src=pr&el=footer). Last update [b4b945a...3c3a099](https://codecov.io/gh/pandas-dev/pandas/pull/23698?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 @douglatornell can you resolve the conflicts please? @datapythonista conflict resolved. Thank you for the work on this @douglatornell, great to have all these fixed.