Align pre-commit and Sphinx rule override syntax

[stefanv]

See #454

/cc @stefmolin

[stefmolin]

I'll start looking at this over the weekend.

[akaszynski]

If I'm not mistaken, we need this for http://github.com/pyvista/pyvista/ since our validation excludes several classes and methods:

numpydoc_validation_exclude = {  # set of regex
    r'\.BasePlotter$',  # Issue with class parameter documentation
    r'\.Plotter$',  # Issue with class parameter documentation
    r'\.WidgetHelper$',
    r'\.PickingHelper$',
    r'\.from_dict$',
    r'\.to_dict$',
    r'\.__init__$',
    r'\.__new__$',
]