Bug summary

I was trying to create a FancyArrow with a butt, but changing the capstyle has no effect. I guess this is related to #13641?

Code for reproduction

import matplotlib.pyplot as plt
from matplotlib.patches import FancyArrow


fig, ax = plt.subplots()
for i, cs in enumerate(['butt', 'round', 'projecting']):
    arrow = FancyArrow(0, 0+i, 1, 0, width=0.1, capstyle=cs)
    ax.add_patch(arrow)

ax.relim()
ax.autoscale_view()
fig.show()

Actual outcome

Expected outcome

Something similar to this:

Additional information

No response

Operating system

No response

Matplotlib Version

3.5.1

Matplotlib Backend

No response

Python version

No response

Jupyter version

No response

Installation

pip