Is your feature request related to a problem? Please describe.

It's minor but often when I'm choosing a revset, I'm trying to modify the current one.

Describe the solution you'd like

It would be nice to have the ability for the text of the current revset to still be there when I go to set the revset. Like say I have ::myBookmark | myBookmark:: and I realize I also want to add ~ main. Right now, if I hit L, the revset is erased and I have to type ::myBookmark | myBookmark:: ~ main in its entirety. That's not the end of the world, it just would be nice not to have to do.

One alternative that would help is if you could yank the current revset. Then you could at least paste it back in to edit.