DOC: Fix quotes position in Timestamp and Timedelta
The validate_docstrings.py validator was returning errors for methods with no comments. I only worked on the methods that already had comments in this PR.

- works on #24070


Hello @diogo-bastos! Thanks for updating the PR.

 - There are no PEP8 issues in the file [`pandas/core/indexes/datetimes.py`](https://github.com/diogo-bastos/pandas/blob/d618b9e6c9a19d6df0c8640d799c8428936cbcb3/pandas/core/indexes/datetimes.py) !

 - There are no PEP8 issues in the file [`pandas/core/indexes/interval.py`](https://github.com/diogo-bastos/pandas/blob/d618b9e6c9a19d6df0c8640d799c8428936cbcb3/pandas/core/indexes/interval.py) !

 - There are no PEP8 issues in the file [`pandas/core/indexes/period.py`](https://github.com/diogo-bastos/pandas/blob/d618b9e6c9a19d6df0c8640d799c8428936cbcb3/pandas/core/indexes/period.py) !

 - There are no PEP8 issues in the file [`pandas/core/indexes/timedeltas.py`](https://github.com/diogo-bastos/pandas/blob/d618b9e6c9a19d6df0c8640d799c8428936cbcb3/pandas/core/indexes/timedeltas.py) !

 - There are no PEP8 issues in the file [`pandas/core/tools/timedeltas.py`](https://github.com/diogo-bastos/pandas/blob/d618b9e6c9a19d6df0c8640d799c8428936cbcb3/pandas/core/tools/timedeltas.py) !

 - There are no PEP8 issues in the file [`pandas/tests/indexes/datetimes/test_timezones.py`](https://github.com/diogo-bastos/pandas/blob/d618b9e6c9a19d6df0c8640d799c8428936cbcb3/pandas/tests/indexes/datetimes/test_timezones.py) !



##### Comment last updated on December 11, 2018 at 22:39 Hours UTC @diogo-bastos some extra information that it was probably not clear in the issue description.

The goal of the issue is to fix the format of the docstrings, and leave them consistent everywhere. For a specific subset of docstrings.

So, regarding the issue, the only change needed is to make sure the The opening and closing quotes are correctly aligned.

So, as the issue says, this is correct:
```
def foo():
    """
    Summary of the docstring.

    Returns
    -------
    str
        Explaining what is being returned.
    """
```

and any other variation is not:
```
def foo():
    """    Summary of the docstring.

    Returns
    -------
    str
        Explaining what is being returned.
    """
```
or
```
def foo():
    """
       Summary of the docstring.

    Returns
    -------
    str
        Explaining what is being returned.
                """
```
etc.

And only for the docstrings reported by the script. So, the call to the script in the issue doesn't report any case once this is finished.

For this PR we don't expect any change to the code, change to other docstrings, change to the content of the docstrings or any unrelated change. If you think something else needs to be changed, open an issue, wait for the discussion on whether it's a good idea, and then open a separate PR specific to that issue. We need to do this to keep pandas development under control, be able to easily revert changes, and not have a chaos where we can't react to something breaking.

The only other thing that would be acceptable as part of this PR, would be to capitalize the summary and add a period at the end.

So, for example:
```
def foo():
    """ summary of the docstring """
```
could become
```
def foo():
    """
    Summary of the docstring.
    """
```

I'm going to close this for now, as I'm not sure if it'll be easier for you to start again in a new PR, or fix this. Feel free to reopen when you have the correct changes, or open a new PR.

Thanks a lot for working on this. Hello @datapythonista , thank you for your feedback and patience. I will open a new PR with the correct changes soon.