bisect: save current state before running a command
This prevents an external command being run during a bisect from
querying stale data.
$ "$TESTDIR/hghave" no-windows || exit 80
$ hg init rep
$ cd rep
$ mkdir dir
$ touch foo dir/bar
$ hg -v addremove
adding dir/bar
adding foo
$ hg -v commit -m "add 1"
dir/bar
foo
committed changeset 0:6f7f953567a2
$ cd dir/
$ touch ../foo_2 bar_2 con.xml
$ hg -v addremove
adding dir/bar_2
adding dir/con.xml
adding foo_2
warning: filename contains 'con', which is reserved on Windows: 'dir/con.xml'
$ hg -v commit -m "add 2"
dir/bar_2
dir/con.xml
foo_2
committed changeset 1:6bb597da00f1
$ cd ..
$ hg init sim
$ cd sim
$ echo a > a
$ echo a >> a
$ echo a >> a
$ echo c > c
$ hg commit -Ama
adding a
adding c
$ mv a b
$ rm c
$ echo d > d
$ hg addremove -n -s 50 # issue 1696
removing a
adding b
removing c
adding d
recording removal of a as rename to b (100% similar)
$ hg addremove -s 50
removing a
adding b
removing c
adding d
recording removal of a as rename to b (100% similar)
$ hg commit -mb