CLN: Fix Spelling Errors
- [X] tests added / passed
- [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`

Fixed some miscellaneous spelling errors.  One test has been re-enabled after not running due to the prefix `tets_` being misspelled.  Not technically a spelling error, but I changed colour -> color in a few places; seems reasonable since the 'u' is omitted in most cases when color is a parameter.  Some changes were just to code comments, so not terribly useful, but makes reading comments a bit nicer.

# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=h1) Report
> Merging [#17535](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/9b21c5456eb4b2cdbc7f74569c4b8660ada951fe?src=pr&el=desc) will **increase** coverage by `<.01%`.
> The diff coverage is `0%`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/17535/graphs/tree.svg?height=150&token=eZ4WkYLtcO&width=650&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #17535      +/-   ##
==========================================
+ Coverage   91.22%   91.23%   +<.01%     
==========================================
  Files         163      163              
  Lines       49606    49606              
==========================================
+ Hits        45254    45257       +3     
+ Misses       4352     4349       -3
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `89.01% <0%> (+0.02%)` | :arrow_up: |
| #single | `40.19% <0%> (-0.07%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/core/reshape/tile.py](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvcmVzaGFwZS90aWxlLnB5) | `90.25% <ø> (ø)` | :arrow_up: |
| [pandas/tseries/util.py](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree#diff-cGFuZGFzL3RzZXJpZXMvdXRpbC5weQ==) | `100% <ø> (ø)` | :arrow_up: |
| [pandas/core/algorithms.py](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvYWxnb3JpdGhtcy5weQ==) | `94.14% <ø> (ø)` | :arrow_up: |
| [pandas/io/stata.py](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree#diff-cGFuZGFzL2lvL3N0YXRhLnB5) | `93.66% <ø> (ø)` | :arrow_up: |
| [pandas/plotting/\_misc.py](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree#diff-cGFuZGFzL3Bsb3R0aW5nL19taXNjLnB5) | `38.98% <ø> (ø)` | :arrow_up: |
| [pandas/io/pytables.py](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree#diff-cGFuZGFzL2lvL3B5dGFibGVzLnB5) | `92.79% <ø> (ø)` | :arrow_up: |
| [pandas/core/reshape/merge.py](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvcmVzaGFwZS9tZXJnZS5weQ==) | `94.26% <ø> (ø)` | :arrow_up: |
| [pandas/plotting/\_tools.py](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree#diff-cGFuZGFzL3Bsb3R0aW5nL190b29scy5weQ==) | `79% <ø> (ø)` | :arrow_up: |
| [pandas/core/indexes/interval.py](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvaW5kZXhlcy9pbnRlcnZhbC5weQ==) | `93.57% <ø> (ø)` | :arrow_up: |
| [pandas/core/reshape/concat.py](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvcmVzaGFwZS9jb25jYXQucHk=) | `97.6% <ø> (ø)` | :arrow_up: |
| ... and [4 more](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree-more) | |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17535?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/17535?src=pr&el=footer). Last update [9b21c54...7312458](https://codecov.io/gh/pandas-dev/pandas/pull/17535?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/17535?src=pr&el=h1) Report
> Merging [#17535](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/9b21c5456eb4b2cdbc7f74569c4b8660ada951fe?src=pr&el=desc) will **increase** coverage by `<.01%`.
> The diff coverage is `0%`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/17535/graphs/tree.svg?height=150&width=650&token=eZ4WkYLtcO&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #17535      +/-   ##
==========================================
+ Coverage   91.22%   91.23%   +<.01%     
==========================================
  Files         163      163              
  Lines       49606    49606              
==========================================
+ Hits        45254    45257       +3     
+ Misses       4352     4349       -3
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `89.01% <0%> (+0.02%)` | :arrow_up: |
| #single | `40.19% <0%> (-0.07%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/plotting/\_misc.py](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree#diff-cGFuZGFzL3Bsb3R0aW5nL19taXNjLnB5) | `38.98% <ø> (ø)` | :arrow_up: |
| [pandas/core/algorithms.py](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvYWxnb3JpdGhtcy5weQ==) | `94.14% <ø> (ø)` | :arrow_up: |
| [pandas/core/reshape/concat.py](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvcmVzaGFwZS9jb25jYXQucHk=) | `97.6% <ø> (ø)` | :arrow_up: |
| [pandas/core/indexes/interval.py](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvaW5kZXhlcy9pbnRlcnZhbC5weQ==) | `93.57% <ø> (ø)` | :arrow_up: |
| [pandas/io/stata.py](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree#diff-cGFuZGFzL2lvL3N0YXRhLnB5) | `93.66% <ø> (ø)` | :arrow_up: |
| [pandas/io/pytables.py](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree#diff-cGFuZGFzL2lvL3B5dGFibGVzLnB5) | `92.79% <ø> (ø)` | :arrow_up: |
| [pandas/core/reshape/merge.py](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvcmVzaGFwZS9tZXJnZS5weQ==) | `94.26% <ø> (ø)` | :arrow_up: |
| [pandas/tseries/util.py](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree#diff-cGFuZGFzL3RzZXJpZXMvdXRpbC5weQ==) | `100% <ø> (ø)` | :arrow_up: |
| [pandas/plotting/\_tools.py](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree#diff-cGFuZGFzL3Bsb3R0aW5nL190b29scy5weQ==) | `79% <ø> (ø)` | :arrow_up: |
| [pandas/core/reshape/tile.py](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvcmVzaGFwZS90aWxlLnB5) | `90.25% <ø> (ø)` | :arrow_up: |
| ... and [4 more](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=tree-more) | |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17535?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/17535?src=pr&el=footer). Last update [9b21c54...7312458](https://codecov.io/gh/pandas-dev/pandas/pull/17535?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 Yes, thanks!