Add wireless simulation to redesigned Mini-NDN using Mininet-wifi.

refs: #4858

Change-Id: If9f7dd069203309c998ab2ff570a6cc8ee362434
diff --git a/minindn/helpers/nfdc.py b/minindn/helpers/nfdc.py
index 16dabb8..4fc9240 100644
--- a/minindn/helpers/nfdc.py
+++ b/minindn/helpers/nfdc.py
@@ -38,7 +38,7 @@
     @staticmethod
     def registerRoute(node, namePrefix, remoteNodeAddress, protocol=PROTOCOL_UDP, origin=255,
                       cost=0, inheritFlag=True, captureFlag=False, expirationInMillis=None):
-        cmd = ('nfdc route add {} {}://{} origin {} cost {} {}{}').format(
+        cmd = ('nfdc route add {} {}://{} origin {} cost {} {}{}{}').format(
             namePrefix,
             protocol,
             remoteNodeAddress,