Make britney2/utils.py PEP-8 clean

Signed-off-by: Niels Thykier <niels@thykier.net>

britney2/utils.py

@@ -156,7 +156,8 @@ def read_nuninst(filename, architectures):
     nuninst = {}
     with open(filename, encoding='ascii') as f:
         for r in f:
-            if ":" not in r: continue
+            if ":" not in r:
+                continue
             arch, packages = r.strip().split(":", 1)
             if arch.split("+", 1)[0] in architectures:
                 nuninst[arch] = set(packages.split())