fix misc style issues

No functional changes here.

BUG=chromium:377211
TEST=`./cbuildbot/run_tests` passes

Change-Id: Ibb2d87a419d4252b680d282358e140fb6f8d1a59
Reviewed-on: https://chromium-review.googlesource.com/201490
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
diff --git a/scripts/cros_extract_deps.py b/scripts/cros_extract_deps.py
index 917d71d..2bacacf 100644
--- a/scripts/cros_extract_deps.py
+++ b/scripts/cros_extract_deps.py
@@ -13,6 +13,7 @@
 from chromite.lib import commandline
 from chromite.lib import cros_build_lib
 
+
 def FlattenDepTree(deptree, pkgtable=None, parentcpv=None):
   """Simplify dependency json.