diff -r 18219c0789ae -r 91f93dcd72aa mercurial/revset.py
--- a/mercurial/revset.py	Sat Sep 17 17:33:34 2011 +0200
+++ b/mercurial/revset.py	Sat Sep 17 17:30:35 2011 +0200
@@ -241,6 +241,7 @@
     ``skip``), or any of the meta-status:
 
     - ``range``      : all csets taking part in the bisection
+    - ``pruned``     : good|bad|skip, excluding out-of-range csets
     """
     status = getstring(x, _("bisect requires a string")).lower()
     return [r for r in subset if r in hbisect.get(repo, status)]