Make tooltips consistent.

src/tooltips.py

@@ -601,7 +601,7 @@ class RosterTooltip(NotificationAreaTooltip):
 					activity_sub = ACTIVITIES[act_plain][activity_sub]
 				activity_sub = \
 					gobject.markup_escape_text(activity_sub)
-				activity_string += ' (%s)</b>' % activity_sub
+				activity_string += ': %s</b>' % activity_sub
 			else:
 				activity_string += '</b>'
 			if contact.activity.has_key('text'):
@@ -738,4 +738,4 @@ class ServiceDiscoveryTooltip(BaseTooltip):
 				'It is most likely legacy or broken'))
 		self.win.add(label)
 
-# vim: se ts=3:
\ No newline at end of file
+# vim: se ts=3: