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_sdk.py b/scripts/cros_sdk.py
index f883bc0..c951cf5 100644
--- a/scripts/cros_sdk.py
+++ b/scripts/cros_sdk.py
@@ -53,6 +53,7 @@
 # Tools needed for --proxy-sim only.
 PROXY_NEEDED_TOOLS = ('ip',)
 
+
 def GetArchStageTarballs(version):
   """Returns the URL for a given arch/version"""
   extension = {'bz2':'tbz2', 'xz':'tar.xz'}