Documentation Link
https://matplotlib.org/stable/api/text_api.html
Problem
arrowprops section states
Valid keys for FancyArrowPatch are:
...
relpos
but relpos is not a valid kwarg for FancyArrowPatch.
Suggested improvement
Fix so that the docs state allowable keys. I can't figure out when relpos is allowed and when it is not.
Matplotlib Version
3.4.3