Replace -A with -D
-A to delete all tasks has bitten me a couple of times. Often projects don't have short forms for commands that are destructive, since they're destructive. My problem is I confuse "-a" and "-A". Clearly this is my problem, but perhaps "-D" for --delete-all would be better. This would also be more consistent, as -d is delete a task so it makes sense that the capital version deletes all tasks.
So, proposed change: -d --delete delete a given task -A --delete-all deletes all tasks becomes: -d --delete delete a given task -D --delete-all deletes all tasks }}}