contrib/bash_completion

--- a/contrib/bash_completion	Fri Nov 22 14:58:41 2013 -0500
+++ b/contrib/bash_completion	Tue Nov 26 14:38:14 2013 -0600
@@ -408,6 +408,10 @@
 
 _hg_cmd_strip()
 {
+    if [[ "$prev" = @(-B|--bookmark) ]]; then
+        _hg_bookmarks
+        return
+    fi
     _hg_labels
 }