Bug report

Bug summary

I tried to customize the text of status bar using format_coord. When the text is long, the status bar of MacOSX backend wouldn't display properly (see image). It seems that the width of the text box does not automatically adjust with the size of the window.

Code for reproduction

ax.format_coord = A_LONG_STRING_HERE

Matplotlib version

• Operating system: macos 10.14.6
• Matplotlib version: 3.1.3
• Matplotlib backend (print(matplotlib.get_backend())): MacOSX
• Python version: 3.7.3