The report table is always wider than terminal

[fregante]

Describe the problem and steps to reproduce it:

Run the basic addons-linter folder/ on an extension with warnings

What happened?

The calculated window with is always ~15 tighter than it is. I'm using a mostly unmodified Terminal.app with Fish Shell. The same happens with zsh. Also same issue when used in VS Code's terminal windows.

web-ext lint is also affected.

Demo

https://github.com/user-attachments/assets/3e765e7c-a098-4301-aaa8-0a05915ef3cd

[ioanarusiczki]

Lgtm with VS code Terminal - using poweshell or cmd