Fix: flake8 warnings

Change-Id: I6e36654d53117327c91f4819afa517ccb13d8952

timmy/cli.py

@@ -386,5 +386,6 @@ def main(argv=None):
             not args.quiet, not conf['offline']]):
         print('Archives available in "%s".' % nm.conf['archive_dir'])
 
+
 if __name__ == '__main__':
     sys.exit(main(sys.argv))

timmy/flock.py

@@ -96,6 +96,7 @@ class FLock:
             # lockfile can be erased and everything still works normally.
             pass
 
+
 # Test main routine
 if __name__ == '__main__':
     import time

timmy/nodes.py

@@ -955,5 +955,6 @@ class NodeManager(object):
 def main(argv=None):
     return 0
 
+
 if __name__ == '__main__':
     sys.exit(main(sys.argv))