Update the common.py file
Solve the dtype issue in pandas
- [ ] closes #45345
- [ Update the pandas.dtype function at line no. 1779] whatsnew entry

Hello @yashrajput0508! Thanks for opening this PR. We checked the lines you've touched for [PEP 8](https://www.python.org/dev/peps/pep-0008) issues, and found:

* In the file [`pandas/core/dtypes/common.py`](https://github.com/pandas-dev/pandas/blob/5ab59b9eb4164969542f16fcf046043db18d85f9/pandas/core/dtypes/common.py):

> [Line 1778:1](https://github.com/pandas-dev/pandas/blob/5ab59b9eb4164969542f16fcf046043db18d85f9/pandas/core/dtypes/common.py#L1778): [W293](https://duckduckgo.com/?q=pep8%20W293) blank line contains whitespace
> [Line 1780:23](https://github.com/pandas-dev/pandas/blob/5ab59b9eb4164969542f16fcf046043db18d85f9/pandas/core/dtypes/common.py#L1780): [E225](https://duckduckgo.com/?q=pep8%20E225) missing whitespace around operator
> [Line 1780:38](https://github.com/pandas-dev/pandas/blob/5ab59b9eb4164969542f16fcf046043db18d85f9/pandas/core/dtypes/common.py#L1780): [E225](https://duckduckgo.com/?q=pep8%20E225) missing whitespace around operator
> [Line 1780:54](https://github.com/pandas-dev/pandas/blob/5ab59b9eb4164969542f16fcf046043db18d85f9/pandas/core/dtypes/common.py#L1780): [E225](https://duckduckgo.com/?q=pep8%20E225) missing whitespace around operator
> [Line 1780:70](https://github.com/pandas-dev/pandas/blob/5ab59b9eb4164969542f16fcf046043db18d85f9/pandas/core/dtypes/common.py#L1780): [E225](https://duckduckgo.com/?q=pep8%20E225) missing whitespace around operator
> [Line 1782:1](https://github.com/pandas-dev/pandas/blob/5ab59b9eb4164969542f16fcf046043db18d85f9/pandas/core/dtypes/common.py#L1782): [W293](https://duckduckgo.com/?q=pep8%20W293) blank line contains whitespace
> [Line 1783:1](https://github.com/pandas-dev/pandas/blob/5ab59b9eb4164969542f16fcf046043db18d85f9/pandas/core/dtypes/common.py#L1783): [W293](https://duckduckgo.com/?q=pep8%20W293) blank line contains whitespace

 If this is supposed to fix a bug, it needs a test for that bug.  Also looks like it is breaking some existing tests. Thanks for the PR @yashrajput0508. But the idea would be to add an example to the docstring that would be run as a doctest. If still interested in working on the docstring, please open a new PR after validating your change by running `ci/code_checks.sh doctests` 