aurweb.spawn: Fix isort errors

Signed-off-by: Lukas Fleischer <lfleischer@archlinux.org>

aurweb/spawn.py

@@ -8,8 +8,8 @@ configuration anyway.
 """
 
 
-import atexit
 import argparse
+import atexit
 import os
 import subprocess
 import sys
@@ -20,7 +20,6 @@ import urllib
 import aurweb.config
 import aurweb.schema
 
-
 children = []
 temporary_dir = None
 verbosity = 0