Fix PR01 errors for melt, option_context, read_fwf, reset_option
All PR01 Errors resolved in the following cases:

1. scripts/validate_docstrings.py --format=actions --errors=PR01 pandas.melt
2. scripts/validate_docstrings.py --format=actions --errors=PR01 pandas.DataFrame.melt
3. scripts/validate_docstrings.py --format=actions --errors=PR01 pandas.option_context
4. scripts/validate_docstrings.py --format=actions --errors=PR01 pandas.read_fwf
5. scripts/validate_docstrings.py --format=actions --errors=PR01 pandas.reset_option

- [x] xref  #57438
- [x] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [x] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [ ] Added [type annotations](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#type-hints) to new arguments/methods/functions.
- [ ] Added an entry in the latest `doc/source/whatsnew/vX.X.X.rst` file if fixing a bug or adding a new feature.

Thanks @jordan-d-murphy 