Fix flake8 warnings.

Author: bd808

iptools/__init__.py

@@ -115,7 +115,7 @@ class IpRange (Sequence):
     >>> 2130706433 in r
     False
     >>> r = IpRange('::ffff:ffff:0000/120')
-    >>> for ip in r: 
+    >>> for ip in r:
     ...     print(ip) # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
     ::ffff:ffff:0 ... ::ffff:ffff:6d ... ::ffff:ffff:ff
 

iptools/ipv4.py

@@ -190,6 +190,7 @@ def bin(x):
 #: (`RFC 919 <https://tools.ietf.org/html/rfc919>`_)
 BROADCAST = "255.255.255.255"
 
+
 def validate_ip(s):
     """Validate a dotted-quad ip address.