status: simplify the post status fixup phases
With the wlock automatically discarding changes when applicable, we can
simplify the code a bit.
* we perform the fixup operation before trying to grab the lock to narrow the `try/except`
* we no longer need to explicitly complare dirstate identities. We can trust
the dirstate internal refresh for that. It would invalidate dirty data when
needed.
* detect still data invalidation by checking the dirty flag before and after
taking the lock. Doing this is actually only necessary to issue the debug
message, we could blindy trust the dirstate internal to ignore the `write`
call on a non-dirty dirstate.
#!/bin/sh
# This scripts is used to setup temp directory in memory
# for running Mercurial tests in vritual machine managed
# by Vagrant (see Vagrantfile for details).
cd /hgshared
make local
cd tests
mkdir /tmp/ram
sudo mount -t tmpfs -o size=100M tmpfs /tmp/ram
export TMPDIR=/tmp/ram
./run-tests.py -l --time