... so canvas.blit(figure.bbox) can be replaced by canvas.blit().

The argumentless form is actually more accurate because the computation
of figure.bbox can suffer from floating point inaccuracies, which,
even if correctly taken into account, could lead to blitting one
row/column too few or too many, whereas canvas.blit() with no
arguments will, well, always blit the full canvas.

Noted in #14225 (which this fixes, even though a separate fix to bettertake into account the floating point inaccuracies is also coming).

PR Summary

PR Checklist

• Has Pytest style unit tests
• Code is Flake 8 compliant
• New features are documented, with examples if plot related
• Documentation is sphinx and numpydoc compliant
• Added an entry to doc/users/next_whats_new/ if major new feature (follow instructions in README.rst there)
• Documented in doc/api/api_changes.rst if API changed in a backward-incompatible way