Add vim modeline to constants.py

Author: bd808

src/iptools/constants.py

@@ -104,3 +104,5 @@
 #: Broadcast messages to the current network (only valid as destination address)
 #: (`RFC 919 <https://tools.ietf.org/html/rfc919>`_)
 BROADCAST               = "255.255.255.255"
+
+# vim: set sw=4 ts=4 sts=4 et :