Fix revert being unusable from an unlocked nodes#show

revert! requires the lock to already be held, correct for nodes#edit
where the editor holds it throughout -- but both exclusive-case
buttons on nodes#show fire from a node that starts out unlocked,
which raised LockedByAnotherUser incorrectly. lock_for_editing! first
makes both call sites safe: a harmless re-stamp when already the
owner, a real but momentary acquisition otherwise, released again by
revert! itself once nothing is left to protect.

0 files changed, 0 insertions, 0 deletions