DOC: Fix pandas.index.copy summary documentation
- [ ] closes https://github.com/pandanistas/pandanistas_sprint_jakarta2020/issues/8
- [ ] tests added / passed
- [ ] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry
Output of `python scripts/validate_docstrings.py pandas.Index.copy`

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######################## Docstring (pandas.Index.copy)  ########################
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Make a copy of this object.

Name and dtype sets those attributes on the new object.

Parameters
----------
name : Label, optional
    Set name for new object.
deep : bool, default False
dtype : numpy dtype or pandas type, optional
    Set dtype for new object.
names : list-like, optional
    Kept for compatibility with MultiIndex. Should not be used.

Returns
-------
Index
    Index refer to new object which is a copy of this object.

Notes
-----
In most cases, there should be no functional difference from using
``deep``, but if ``deep`` is passed it will attempt to deepcopy.

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################################## Validation ##################################
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3 Errors found:
        Parameter "deep" has no description
        See Also section not found
        No examples section found