Based on How do you comment out all or part of a Lisp s-exp using Paredit? I did C-M-space
then M-;
and got, as expected, a commented-out S-exp:
;; (when window-system
;; (sr-speedbar-open))
Now how do I delete those semicolons? When I try the obvious (backspace or delete), only one semicolon disappears. I also can't just undo, since I've done other stuff between adding the semicolons and wanting to delete them. I could also turn off paredit for this task, but I'm certain there's a more elegant way.