DRY (Don't Repeat Yourself). I'm generalizing an existing function. Doing it this way keeps the code shorter, and in the event that 'ac-qq1 has a bug, then 'ac-qqx probably does too, and if I do it this way then when I (or someone else) tries to merge fixes for 'ac-qq1 they'll get a conflict indicating that they need to modify the fixes for 'ac-qqx rather than having it silently succeed, leaving bugs in 'ac-qqx.
