Fix Python syntax for dict literals

zenmap/zenmapGUI/TopologyPage.py

@@ -140,7 +140,7 @@ class TopologyPage(HIGVBox):
         self.slow_label.set_text(_("""\
 Topology is disabled because too many hosts can cause it
 to run slowly. The limit is %(limit)d hosts and there are %(num)d.\
-""" % {limit = SLOW_LIMIT, num = len(hosts_up)}))
+""" % {'limit': SLOW_LIMIT, 'num': len(hosts_up)}))
 
         if len(hosts_up) <= SLOW_LIMIT:
             self.radialnet.show()