Register changes using allout-exposure-change-hook.
Disregard aberrant topics.
(allout-shift-in): With universal-argument, make topic a peer of
- it's former offspring. Simplify the code by separating out
+ its former offspring. Simplify the code by separating out
allout-shift-out functionality.
(allout-shift-out): With universal-argument, make offspring peers
of their former container, and its siblings. Implement the