docstring templates not being filled

[jbrockmendel]

>>> print(pd.DatetimeIndex.fillna.__doc__)

Fill NA/NaN values with the specified value

Parameters
----------
value : scalar
    Scalar value to use to fill holes (e.g. 0).
    This value cannot be a list-likes.
downcast : dict, default is None
    a dict of item->dtype of what to downcast if possible,
    or the string 'infer' which will try to downcast to an appropriate
    equal type (e.g. float64 to int64 if possible)

Returns
-------
filled : %(klass)s

I'm pretty sure that the %(klass)s is supposed to be DatetimeIndex.

[gfyoung]

Looks like a missing template parameter in pandas/core/indexes/base.py.

@jbrockmendel : Perhaps it should just be Index ?

print(pd.DatetimeIndex.dropna.__doc__)

Outputs:

Return Index without NA/NaN values

Parameters
----------
how :  {'any', 'all'}, default 'any'
    If the Index is a MultiIndex, drop the value when any or all levels
    are NaN.

Returns
-------
valid : Index

[gfyoung]

cc @jreback