changegroup: flush the ui stdio buffers after adding a changegroup
This eliminates the following test failure on Windows, as well as a similar one
in evolve's test-wireproto.t. See the previous patch for details on the
problem.
--- e:/Projects/hg/tests/test-init.t
+++ e:/Projects/hg/tests/test-init.t.err
@@ -216,10 +216,10 @@
* test 0:08b9e9f63b32
$ hg clone -e "python \"$TESTDIR/dummyssh\"" local ssh://user@dummy/remote-bookmarks
searching for changes
+ exporting bookmark test
remote: adding changesets
remote: adding manifests
remote: adding file changes
remote: added 1 changesets with 1 changes to 1 files
- exporting bookmark test
$ hg -R remote-bookmarks bookmarks
test 0:08b9e9f63b32
$ hg init
$ touch unknown
$ touch a
$ hg add a
$ hg ci -m "1"
$ touch b
$ hg add b
$ hg ci -m "2"
Should show unknown
$ hg status
? unknown
$ hg revert -r 0 --all
removing b
Should show unknown and b removed
$ hg status
R b
? unknown
Should show a and unknown
$ ls
a
unknown