ellen

Had to check since this is something I've been wondering myself, but apparently not possible. From the fish FAQ:

Because history substitution is an awkward interface that was invented before interactive line editing was even possible. Instead of adding this pseudo-syntax, fish opts for nice history searching and recall features. Switching requires a small change of habits: if you want to modify an old line/word, first recall it, then edit.

However, for the use case here, with sudo:

As a special case, most of the time history substitution is used as sudo !!. In that case just press Alt+S, and it will recall your last commandline with sudo prefixed (or toggle a sudo prefix on the current commandline if there is anything).

sh.itjust.works seems to be running Lemmy 0.17 while midwest.social has updated to 0.18. I'd guess that's the reason behind this.

Would love to test it out, if the opportunity arises.