DOC: Update to docstring of DataFrame(dtype) (#14764)
 - [ ] closes #14764 
 - [ ] tests added / passed
 - [ ] passes ``git diff upstream/master --name-only -- '*.py' | flake8 --diff``
 - [ ] whatsnew entry

# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16487?src=pr&el=h1) Report
> Merging [#16487](https://codecov.io/gh/pandas-dev/pandas/pull/16487?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/97ad3fb9c87226ad983267e2891dbbf68432b8ea?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/16487/graphs/tree.svg?height=150&width=650&token=eZ4WkYLtcO&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/16487?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master   #16487   +/-   ##
=======================================
  Coverage    90.4%    90.4%           
=======================================
  Files         161      161           
  Lines       51033    51033           
=======================================
  Hits        46136    46136           
  Misses       4897     4897
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `88.24% <0%> (ø)` | :arrow_up: |
| #single | `40.17% <0%> (ø)` | :arrow_up: |


------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16487?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/16487?src=pr&el=footer). Last update [97ad3fb...7ae1e3e](https://codecov.io/gh/pandas-dev/pandas/pull/16487?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/16487?src=pr&el=h1) Report
> Merging [#16487](https://codecov.io/gh/pandas-dev/pandas/pull/16487?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/ef487d9e474e8052c0f7c6260de5802a950defad?src=pr&el=desc) will **decrease** coverage by `0.04%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/16487/graphs/tree.svg?width=650&height=150&src=pr&token=eZ4WkYLtcO)](https://codecov.io/gh/pandas-dev/pandas/pull/16487?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #16487      +/-   ##
==========================================
- Coverage   90.79%   90.75%   -0.05%     
==========================================
  Files         161      161              
  Lines       51063    51071       +8     
==========================================
- Hits        46365    46348      -17     
- Misses       4698     4723      +25
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `88.59% <ø> (-0.05%)` | :arrow_down: |
| #single | `40.11% <ø> (-0.05%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/16487?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/core/frame.py](https://codecov.io/gh/pandas-dev/pandas/pull/16487?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZnJhbWUucHk=) | `97.66% <ø> (ø)` | :arrow_up: |
| [pandas/io/formats/terminal.py](https://codecov.io/gh/pandas-dev/pandas/pull/16487?src=pr&el=tree#diff-cGFuZGFzL2lvL2Zvcm1hdHMvdGVybWluYWwucHk=) | `16.43% <0%> (-31.39%)` | :arrow_down: |
| [pandas/core/window.py](https://codecov.io/gh/pandas-dev/pandas/pull/16487?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvd2luZG93LnB5) | `96.49% <0%> (+0.01%)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16487?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/16487?src=pr&el=footer). Last update [ef487d9...edc1c04](https://codecov.io/gh/pandas-dev/pandas/pull/16487?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 @VincentLa Thanks!