Potentially broken word wrapping on main

[TheLostLambda]

Just a quick report, and I might have time to dig a bit deeper later on, but I've noticed a few times that I'll get some strange wrapping where the GraphicalReportHandler will move from the first to the second line, print exactly one word, then move to a third line.

I'm not particularly sure why yet, but it looks something like this:

Here, the is the lonely word that gets banished to that middle line, though I think I've seen this with a as well, so it seems like one-char words are enough to trigger this issue. Resizing the terminal a bit causes the problem to disappear or reappear, so perhaps there is some sort of off-by-one, or several levels of wrapping that don't communicate indentation properly?

Hard to say, but I've left it here in case anyone else has more time to look into it than I do!

[TheLostLambda]

Oh, and as the title implies, this is using the current main branch of miette — I've not yet been able to check other versions!

[zkat]

My guess: the wrapping for the nested diagnostic is not taking into account that it's getting nested, so it's using the column count of the parent.

[TheLostLambda]

Just another note to myself or whoever picks this up (if they beat me to it!) — I've got a new contender for ugliest wrapping!

Those two #[related] errors there are causing some bonus trouble!