Update on pull -u when heads were closed (fixes issue666).
Patch written by Benoit Boissinot.
This should probably be improved in the future to handle long-living
branches, as joining two "other" heads will switch to that new head.
But this is not a new problem, as adding to the "other" head would have
switched to that new head, too.
#!/bin/sh
hg
hg -q
hg help
hg -q help
hg add -h
hg add --skjdfks
hg help diff
hg help status
hg -q help status
hg help foo
hg skjdfks
exit 0