DOC: fix docstring for pandas.read_parquet
- [ ] closes #xxxx
- [ ] tests added / passed
- [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

```
################################################################################
####################### Docstring (pandas.read_parquet)  #######################
################################################################################

Load a parquet object from the file path, returning a DataFrame.

.. versionadded 0.21.0

Parameters
----------
path : str
    File path.
engine : {'auto', 'pyarrow', 'fastparquet'}, default 'auto'
    Parquet library to use. If 'auto', then the option
    ``io.parquet.engine`` is used. The default ``io.parquet.engine``
    behavior is to try 'pyarrow', falling back to 'fastparquet' if
    'pyarrow' is unavailable.
columns : list, default=None
    If not None, only these columns will be read from the file.

    .. versionadded 0.21.1
**kwargs
    Any additional kwargs are passed to the engine.

Returns
-------
DataFrame
    A parquet file is returned as two-dimensional data structure with
    labeled axes.

See Also
--------
to_parquet : Write DataFrame to a parquet file.
read_csv : Read a comma-separated values (csv) file into DataFrame.

Examples
--------
>>> pd.read_parquet('data.parquet')  # doctest: +SKIP

################################################################################
################################## Validation ##################################
################################################################################

Docstring for "pandas.read_parquet" correct. :)
```
# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25532?src=pr&el=h1) Report
> Merging [#25532](https://codecov.io/gh/pandas-dev/pandas/pull/25532?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/bd49d2f2af5c44d4f96031757743ba83e6b29408?src=pr&el=desc) will **not change** coverage.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/25532/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/25532?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master   #25532   +/-   ##
=======================================
  Coverage   91.75%   91.75%           
=======================================
  Files         173      173           
  Lines       52960    52960           
=======================================
  Hits        48595    48595           
  Misses       4365     4365
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.33% <ø> (ø)` | :arrow_up: |
| #single | `41.71% <ø> (ø)` | :arrow_up: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/25532?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/io/parquet.py](https://codecov.io/gh/pandas-dev/pandas/pull/25532/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL3BhcnF1ZXQucHk=) | `84.61% <ø> (ø)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25532?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/25532?src=pr&el=footer). Last update [bd49d2f...23cb852](https://codecov.io/gh/pandas-dev/pandas/pull/25532?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/25532?src=pr&el=h1) Report
> Merging [#25532](https://codecov.io/gh/pandas-dev/pandas/pull/25532?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/bd49d2f2af5c44d4f96031757743ba83e6b29408?src=pr&el=desc) will **decrease** coverage by `0.49%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/25532/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/25532?src=pr&el=tree)

```diff
@@            Coverage Diff            @@
##           master   #25532     +/-   ##
=========================================
- Coverage   91.75%   91.26%   -0.5%     
=========================================
  Files         173      173             
  Lines       52960    52968      +8     
=========================================
- Hits        48595    48339    -256     
- Misses       4365     4629    +264
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `89.83% <ø> (-0.5%)` | :arrow_down: |
| #single | `41.71% <ø> (-0.01%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/25532?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/io/parquet.py](https://codecov.io/gh/pandas-dev/pandas/pull/25532/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL3BhcnF1ZXQucHk=) | `84.61% <ø> (ø)` | :arrow_up: |
| [pandas/core/panel.py](https://codecov.io/gh/pandas-dev/pandas/pull/25532/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvcGFuZWwucHk=) | `38.56% <0%> (-33.19%)` | :arrow_down: |
| [pandas/core/sparse/series.py](https://codecov.io/gh/pandas-dev/pandas/pull/25532/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvc3BhcnNlL3Nlcmllcy5weQ==) | `93.3% <0%> (-2.24%)` | :arrow_down: |
| [pandas/core/indexing.py](https://codecov.io/gh/pandas-dev/pandas/pull/25532/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvaW5kZXhpbmcucHk=) | `90.88% <0%> (-1.41%)` | :arrow_down: |
| [pandas/core/internals/managers.py](https://codecov.io/gh/pandas-dev/pandas/pull/25532/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvaW50ZXJuYWxzL21hbmFnZXJzLnB5) | `93.92% <0%> (-0.92%)` | :arrow_down: |
| [pandas/core/generic.py](https://codecov.io/gh/pandas-dev/pandas/pull/25532/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZ2VuZXJpYy5weQ==) | `93.65% <0%> (-0.51%)` | :arrow_down: |
| [pandas/core/ops.py](https://codecov.io/gh/pandas-dev/pandas/pull/25532/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvb3BzLnB5) | `91.63% <0%> (-0.14%)` | :arrow_down: |
| [pandas/core/frame.py](https://codecov.io/gh/pandas-dev/pandas/pull/25532/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZnJhbWUucHk=) | `96.79% <0%> (-0.06%)` | :arrow_down: |
| [pandas/plotting/\_core.py](https://codecov.io/gh/pandas-dev/pandas/pull/25532/diff?src=pr&el=tree#diff-cGFuZGFzL3Bsb3R0aW5nL19jb3JlLnB5) | `83.53% <0%> (-0.05%)` | :arrow_down: |
| [pandas/io/formats/style.py](https://codecov.io/gh/pandas-dev/pandas/pull/25532/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL2Zvcm1hdHMvc3R5bGUucHk=) | `96.69% <0%> (ø)` | :arrow_up: |
| ... and [2 more](https://codecov.io/gh/pandas-dev/pandas/pull/25532/diff?src=pr&el=tree-more) | |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25532?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/25532?src=pr&el=footer). Last update [bd49d2f...b183089](https://codecov.io/gh/pandas-dev/pandas/pull/25532?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 Closing in favor of #25164 which appears more active