Bug summary

See title

Code for reproduction

import matplotlib as mpl
mpl.cm.register_cmap("test", mpl.colors.ListedColormap(["C0", "C1"]))

Actual outcome

PendingDeprecationWarning: The register_cmap function will be deprecated in a future version.
Use ``matplotlib.colormaps.register_cmap(name)`` instead.

Expected outcome

I think there's two problems here:

• The function is called matplotlib.colormaps.register
• The signature for that function is mpl.colormaps.register(cmap, *, name=None, force=False)

Additional information

No response

Operating system

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Matplotlib Version

3.6.0.rc1

Matplotlib Backend

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Python version

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Jupyter version

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Installation

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