diff --git a/generate.py b/generate.py
index 80c62691b7e1f16c7faacad22d61cc097b31a852..4cbab193718ebb1da783e3895b32e091fc477e20 100755
--- a/generate.py
+++ b/generate.py
@@ -108,7 +108,9 @@ def retrieve_hosts():
                             break
                         host.append(alt)
 
-    req_set = set(s.strip() for s in config['excludes']['required'].split(',') if s.strip())
+    req_set = set(s.strip() for s in config['excludes']['required'].split(',')
+                  if s.strip())
+
     def intersects(s):
         cmp_set = s.copy()
         for x in s: