DOC: whatsnew 0.24.0 corrections & edits & remove some warnings
Hello @jreback! Thanks for updating the PR.

 - There are no PEP8 issues in the file [`doc/source/conf.py`](https://github.com/jreback/pandas/blob/f225dbbadb228400a358ef9b93f717a6eb55b803/doc/source/conf.py) !

 - There are no PEP8 issues in the file [`pandas/core/indexes/accessors.py`](https://github.com/jreback/pandas/blob/f225dbbadb228400a358ef9b93f717a6eb55b803/pandas/core/indexes/accessors.py) !



##### Comment last updated on December 15, 2018 at 22:18 Hours UTC @datapythonista @TomAugspurger if any comments. # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/24298?src=pr&el=h1) Report
> Merging [#24298](https://codecov.io/gh/pandas-dev/pandas/pull/24298?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/ca85a41242af245b32f6c62580b072d1685342d4?src=pr&el=desc) will **decrease** coverage by `49.26%`.
> The diff coverage is `20%`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/24298/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/24298?src=pr&el=tree)

```diff
@@             Coverage Diff             @@
##           master   #24298       +/-   ##
===========================================
- Coverage   92.28%   43.01%   -49.27%     
===========================================
  Files         162      162               
  Lines       51827    51827               
===========================================
- Hits        47827    22292    -25535     
- Misses       4000    29535    +25535
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `?` | |
| #single | `43.01% <20%> (ø)` | :arrow_up: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/24298?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/core/indexes/accessors.py](https://codecov.io/gh/pandas-dev/pandas/pull/24298/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvaW5kZXhlcy9hY2Nlc3NvcnMucHk=) | `64.35% <20%> (-26.74%)` | :arrow_down: |
| [pandas/io/formats/latex.py](https://codecov.io/gh/pandas-dev/pandas/pull/24298/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL2Zvcm1hdHMvbGF0ZXgucHk=) | `0% <0%> (-100%)` | :arrow_down: |
| [pandas/core/categorical.py](https://codecov.io/gh/pandas-dev/pandas/pull/24298/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvY2F0ZWdvcmljYWwucHk=) | `0% <0%> (-100%)` | :arrow_down: |
| [pandas/io/sas/sas\_constants.py](https://codecov.io/gh/pandas-dev/pandas/pull/24298/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL3Nhcy9zYXNfY29uc3RhbnRzLnB5) | `0% <0%> (-100%)` | :arrow_down: |
| [pandas/tseries/plotting.py](https://codecov.io/gh/pandas-dev/pandas/pull/24298/diff?src=pr&el=tree#diff-cGFuZGFzL3RzZXJpZXMvcGxvdHRpbmcucHk=) | `0% <0%> (-100%)` | :arrow_down: |
| [pandas/tseries/converter.py](https://codecov.io/gh/pandas-dev/pandas/pull/24298/diff?src=pr&el=tree#diff-cGFuZGFzL3RzZXJpZXMvY29udmVydGVyLnB5) | `0% <0%> (-100%)` | :arrow_down: |
| [pandas/io/formats/html.py](https://codecov.io/gh/pandas-dev/pandas/pull/24298/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL2Zvcm1hdHMvaHRtbC5weQ==) | `0% <0%> (-98.65%)` | :arrow_down: |
| [pandas/core/groupby/categorical.py](https://codecov.io/gh/pandas-dev/pandas/pull/24298/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZ3JvdXBieS9jYXRlZ29yaWNhbC5weQ==) | `0% <0%> (-95.46%)` | :arrow_down: |
| [pandas/io/sas/sas7bdat.py](https://codecov.io/gh/pandas-dev/pandas/pull/24298/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL3Nhcy9zYXM3YmRhdC5weQ==) | `0% <0%> (-91.17%)` | :arrow_down: |
| [pandas/io/sas/sas\_xport.py](https://codecov.io/gh/pandas-dev/pandas/pull/24298/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL3Nhcy9zYXNfeHBvcnQucHk=) | `0% <0%> (-90.15%)` | :arrow_down: |
| ... and [121 more](https://codecov.io/gh/pandas-dev/pandas/pull/24298/diff?src=pr&el=tree-more) | |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/24298?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/24298?src=pr&el=footer). Last update [ca85a41...f225dbb](https://codecov.io/gh/pandas-dev/pandas/pull/24298?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/24298?src=pr&el=h1) Report
> Merging [#24298](https://codecov.io/gh/pandas-dev/pandas/pull/24298?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/66fb79853cc699ec45feee097191c58de042cf3d?src=pr&el=desc) will **decrease** coverage by `<.01%`.
> The diff coverage is `80%`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/24298/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/24298?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #24298      +/-   ##
==========================================
- Coverage   92.28%   92.28%   -0.01%     
==========================================
  Files         162      162              
  Lines       51831    51831              
==========================================
- Hits        47832    47831       -1     
- Misses       3999     4000       +1
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.68% <80%> (ø)` | :arrow_up: |
| #single | `43.01% <20%> (ø)` | :arrow_up: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/24298?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/core/indexes/accessors.py](https://codecov.io/gh/pandas-dev/pandas/pull/24298/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvaW5kZXhlcy9hY2Nlc3NvcnMucHk=) | `91.08% <80%> (ø)` | :arrow_up: |
| [pandas/util/testing.py](https://codecov.io/gh/pandas-dev/pandas/pull/24298/diff?src=pr&el=tree#diff-cGFuZGFzL3V0aWwvdGVzdGluZy5weQ==) | `87.48% <0%> (-0.1%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/24298?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/24298?src=pr&el=footer). Last update [66fb798...cf1e3d3](https://codecov.io/gh/pandas-dev/pandas/pull/24298?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 @jorisvandenbossche 
 He may be unavailable this week.

Taking a look now. pushed @TomAugspurger  LGTM. Thanks for tracking all these down.