Setting the terminal colour to :default is special

[tecosaur]

It is worth taking note of the fact that the "default" colour in a
terminal can be set with the -9 ANSI codes. Without this, dodgy control
codes can be emitted when the current default face is changed, resulting
in visual artifacts.

[caleb-allen]

Out of curiosity, is this well supported? I know that the reset code for the cursor is often quite buggy

[tecosaur]

My impression is that \e[39m and friends are very well supported. As a "near-worst case" test I just tried and it worked fine in TTY1. "Cursor reset" is in a separate terminal comparability bag in my mind at least.

We actually want to fix the "dodgy control codes can be emitted" issue at some point in the future. I see this as basically an indirect fix that also makes some sense in its own right.

[caleb-allen]

For sure, makes perfect sense 👍