[DOC] Star symbols (*) are escaped in docs signatures.

[ImportanceOfBeingErnest]

Bug report

In the current docs, the signatures render with star symbols/asterix being escaped, like

suptitle(self, t, \*\*kwargs)

e.g.

matplotlib.figure.Figure.suptitle

Matplotlib version

• Matplotlib version: current docs / devdocs

[anntzer]

I think this is numpy/numpydoc#256; see as to how skimage fixed that.