inotify: inotify.server.walkrepodirs() simplify walking
Do not 'yield tuple, boolean' to filter later on the boolean.
Test the boolean first, and yield tuple only if needed.
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
removing b
created new head
% should abort
abort: crosses branches (use 'hg merge' or 'hg update -C' to discard changes)
% should succeed
abort: crosses branches (use 'hg merge' or 'hg update -C')