2.3 regression in clearing terminal progress bars

[Max Bowsher]

2.3 has regressed in clearing terminal progress bars vs. 2.2

e.g.:

maxb@chimaera:~$ bzr init bzr+ssh://localhost/tmp/x
Created a standalone branch (format: unnamed)
maxb@chimaera:~$ bzr info bzr+ssh://localhost/tmp/x
Standalone branch (format: unnamed)
Location:
  branch root: bzr+ssh://localhost/tmp/x/
maxb@chimaera:~$ s /

^^^ Observe spurious "s /"

[Max Bowsher (maxb)]

Whether the above example works as a reproducer depends upon the your shell prompt not being long enough to hide the evidence.

Bisection reveals the regression occurred in bzr.dev r5473 - http://bazaar.launchpad.net/~bzr-pqm/bzr/bzr.dev/revision/5473