gloss-latin sets catcode of ^ to 12

[u-fischer]

gloss-latin.def initiate the ^ shorthand and then deactivates it again with \shorthandoff{^}. But this resets the catcode to 12 and not to 7 as needed. This didn't lead to problems in real documents as a following \ExplSyntaxOff did reset the catcode later. But a recent change in expl3 no longer does it and so the problem appeared: https://tex.stackexchange.com/q/663753/2388. We will revert the change in expl3 for now, but it would be nevertheless better if polyglossia would use \shorthandoff*{^} as it does also later in the code.

[jspitz]

Inviting @wehro

[wehro]

@u-fischer is right, of course. The missing star has been overlooked before.

[thomwiggers]

There seem some remaining issues with the catcode for ^ if you use them in .aux files: #582