Add blank lines for lint

examples/complex/dns_spoofing.py

@@ -27,6 +27,7 @@ import re
 # https://bugzilla.mozilla.org/show_bug.cgi?id=45891
 parse_host_header = re.compile(r"^(?P<host>[^:]+|\[.+\])(?::(?P<port>\d+))?$")
 
+
 class Rerouter:
     def __init__(self):
         self.hostHeader = None
@@ -54,5 +55,6 @@ class Rerouter:
         flow.request.host = sni or host_header
         flow.request.port = port
 
+
 def start():
     return Rerouter()