DOC: Fix order of sections in Series docstrings
For consistency and to make our users life easier, we try to keep the same order of the sections in docstrings.

The right order of the sections is the defined by the numpydoc standard: https://numpydoc.readthedocs.io/en/latest/format.html#sections

Checking for errors in pandas `Series` attributes, we find many cases where the order is wrong:
```
$ ./scripts/validate_docstrings.py --prefix=pandas.Series --errors=GL07
pandas.Series.astype: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.infer_objects: Sections are in the wrong order. Correct order is: Returns, See Also, Examples
pandas.Series.convert_objects: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also
pandas.Series.at: Sections are in the wrong order. Correct order is: Raises, See Also, Examples
pandas.Series.iat: Sections are in the wrong order. Correct order is: Raises, See Also, Examples
pandas.Series.loc: Sections are in the wrong order. Correct order is: Raises, See Also, Examples
pandas.Series.add: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.sub: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.mul: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.div: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.truediv: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.floordiv: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.mod: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.pow: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.radd: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.rsub: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.rmul: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.rdiv: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.rtruediv: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.rfloordiv: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.rmod: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.rpow: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.lt: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.gt: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.le: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.ge: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.ne: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.eq: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.agg: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Notes, Examples
pandas.Series.aggregate: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Notes, Examples
pandas.Series.rolling: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Notes, Examples
pandas.Series.expanding: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Notes, Examples
pandas.Series.ewm: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Notes, Examples
pandas.Series.pipe: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Notes
pandas.Series.abs: Sections are in the wrong order. Correct order is: Returns, See Also, Notes, Examples
pandas.Series.between: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Notes, Examples
pandas.Series.clip: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.cummax: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.cummin: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.cumprod: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.cumsum: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.nlargest: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Notes, Examples
pandas.Series.nsmallest: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Notes, Examples
pandas.Series.quantile: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.nonzero: Sections are in the wrong order. Correct order is: See Also, Examples
pandas.Series.drop: Sections are in the wrong order. Correct order is: Parameters, Returns, Raises, See Also, Examples
pandas.Series.duplicated: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.first: Sections are in the wrong order. Correct order is: Parameters, Returns, Raises, See Also, Examples
pandas.Series.idxmax: Sections are in the wrong order. Correct order is: Parameters, Returns, Raises, See Also, Notes, Examples
pandas.Series.idxmin: Sections are in the wrong order. Correct order is: Parameters, Returns, Raises, See Also, Notes, Examples
pandas.Series.last: Sections are in the wrong order. Correct order is: Parameters, Returns, Raises, See Also, Examples
pandas.Series.reindex: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.where: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Notes, Examples
pandas.Series.mask: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Notes, Examples
pandas.Series.filter: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Notes, Examples
pandas.Series.fillna: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.argmin: Sections are in the wrong order. Correct order is: Parameters, Returns, Raises, See Also, Notes, Examples
pandas.Series.argmax: Sections are in the wrong order. Correct order is: Parameters, Returns, Raises, See Also, Notes, Examples
pandas.Series.unstack: Sections are in the wrong order. Correct order is: Parameters, Returns, Examples
pandas.Series.append: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Notes, Examples
pandas.Series.asfreq: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Notes, Examples
pandas.Series.asof: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Notes, Examples
pandas.Series.resample: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Notes, Examples
pandas.Series.at_time: Sections are in the wrong order. Correct order is: Parameters, Returns, Raises, See Also, Examples
pandas.Series.between_time: Sections are in the wrong order. Correct order is: Parameters, Returns, Raises, See Also, Examples
pandas.Series.tshift: Sections are in the wrong order. Correct order is: Parameters, Returns, Notes
pandas.Series.slice_shift: Sections are in the wrong order. Correct order is: Parameters, Returns, Notes
pandas.Series.dt.dayofweek: Sections are in the wrong order. Correct order is: Returns, See Also, Examples
pandas.Series.dt.weekday: Sections are in the wrong order. Correct order is: Returns, See Also, Examples
pandas.Series.dt.to_period: Sections are in the wrong order. Correct order is: Parameters, Returns, Raises, See Also, Examples
pandas.Series.dt.to_pytimedelta: Sections are in the wrong order. Correct order is: Returns, See Also, Examples
pandas.Series.str.count: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Notes, Examples
pandas.Series.str.join: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Notes, Examples
pandas.Series.str.get_dummies: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.cat.rename_categories: Sections are in the wrong order. Correct order is: Parameters, Returns, Raises, See Also, Examples
pandas.Series.cat.reorder_categories: Sections are in the wrong order. Correct order is: Parameters, Returns, Raises, See Also
pandas.Series.cat.add_categories: Sections are in the wrong order. Correct order is: Parameters, Returns, Raises, See Also
pandas.Series.cat.remove_categories: Sections are in the wrong order. Correct order is: Parameters, Returns, Raises, See Also
pandas.Series.cat.set_categories: Sections are in the wrong order. Correct order is: Parameters, Returns, Raises, See Also
pandas.Series.to_excel: Sections are in the wrong order. Correct order is: Parameters, See Also, Notes, Examples
pandas.Series.to_xarray: Sections are in the wrong order. Correct order is: Returns, See Also, Notes, Examples
pandas.Series.as_matrix: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Notes
pandas.Series.divide: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.divmod: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.from_csv: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also
pandas.Series.multiply: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.rdivmod: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
pandas.Series.subtract: Sections are in the wrong order. Correct order is: Parameters, Returns, See Also, Examples
```

We should change the order of the sections in these methods, so the call to the script doesn't report any error.