DOC: Fix Docstring validation for pandas.Series.floordiv and others
ref: #58504 

fixes PR07 in:
```
pandas.Series.floordiv
pandas.Series.pow
pandas.Series.rmod
pandas.Series.rmod
pandas.Series.rtruediv
pandas.Series.sub
pandas.Series.eq
pandas.Series.ge
pandas.Series.gt
pandas.Series.le
pandas.Series.lt
pandas.Series.ne
```

Also fixes PR07 in Series.:

radd, rsub, rmul, rdiv, rfloordiv, rpow Thanks @sam-baumann 