mercurial/commands.py

--- a/mercurial/commands.py	Tue Aug 08 17:25:38 2017 -0700
+++ b/mercurial/commands.py	Wed Aug 02 18:34:39 2017 +0200
@@ -4850,9 +4850,10 @@
         if p.obsolete():
             ui.write(_(' (obsolete)'))
         if p.troubled():
+            instabilities = (ui.label(instability, 'trouble.%s' % instability)
+                             for instability in p.instabilities())
             ui.write(' ('
-                     + ', '.join(ui.label(trouble, 'trouble.%s' % trouble)
-                                 for trouble in p.troubles())
+                     + ', '.join(instabilities)
                      + ')')
         ui.write('\n')
         if p.description():