(allout-prefix-data): Doc fix.

(allout-prefix-data): Doc fix.
(allout-show-current-subtree): Reflow docstring.
(allout-use-mode-specific-leader, allout-use-hanging-indents,
produce-allout-mode-map, allout-overlay-interior-modification-handler,
allout-next-heading, allout-previous-heading, allout-rebullet-heading,
allout-rebullet-topic, allout-rebullet-topic-grunt, allout-kill-topic,
allout-copy-topic-as-kill, allout-listify-exposed, allout-process-exposed,
allout-encrypted-key-info, allout-update-passphrase-mnemonic-aids,
allout-next-topic-pending-encryption, allout-tests-globally-true):
Fix typos in docstrings.