dispatch: adjust ui.flush() timing to stabilize test-blackbox.t
Without this change, dispatch.dispatch() could return before flushing all
stdio data. This means chg stdio would print data after receiving the result
code.
--- tests/test-blackbox.t
+++ tests/test-blackbox.t.err
@@ -354,13 +354,13 @@
> EOF
$ hg log --debug
removing $TESTTMP/gone/.hg
- warning: cannot write to blackbox.log: $ENOENT$ (no-windows !)
warning: cannot write to blackbox.log: $TESTTMP/gone/.hg/blackbox.log: $ENOTDIR$ (windows !)
$ cd ..
blackbox should disable itself if track is empty
$ hg --config blackbox.track= init nothing_tracked
+ warning: cannot write to blackbox.log: $ENOENT$
$ cd nothing_tracked
$ cat >> .hg/hgrc << EOF
> [blackbox]
#!/usr/bin/env python
#
# An example hgweb CGI script, edit as necessary
# See also https://mercurial-scm.org/wiki/PublishingRepositories
# Path to repo or hgweb config to serve (see 'hg help hgweb')
config = "/path/to/repo/or/config"
# Uncomment and adjust if Mercurial is not installed system-wide
# (consult "installed modules" path from 'hg debuginstall'):
# import sys; sys.path.insert(0, "/path/to/python/lib")
# Uncomment to send python tracebacks to the browser if an error occurs:
# import cgitb; cgitb.enable()
from mercurial import demandimport
demandimport.enable()
from mercurial.hgweb import hgweb, wsgicgi
application = hgweb(config)
wsgicgi.launch(application)