Format python files using yapf

Change-Id: I8b7b97efb6bfdcceef9efc533cdaa0675ab7db40
diff --git a/tools/utils_aosp.py b/tools/utils_aosp.py
index 216e43d..e8b0ffb 100644
--- a/tools/utils_aosp.py
+++ b/tools/utils_aosp.py
@@ -3,7 +3,6 @@
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
-
 from os.path import join
 from subprocess import check_call
 
@@ -17,19 +16,22 @@
 
 DEFAULT_ROOT = join(utils.REPO_ROOT, 'build', 'aosp')
 
+
 def add_root_argument(parser):
-  parser.add_argument('--aosp-root',
-      help='Root of the AOSP checkout. ' +
-           'Defaults to ' +  DEFAULT_ROOT +'.',
-      default=DEFAULT_ROOT)
+    parser.add_argument('--aosp-root',
+                        help='Root of the AOSP checkout. ' + 'Defaults to ' +
+                        DEFAULT_ROOT + '.',
+                        default=DEFAULT_ROOT)
+
 
 def add_common_arguments(parser):
-  add_root_argument(parser)
-  parser.add_argument('--lunch',
-      help='Build menu. ' +
-           'Defaults to ' + DEFAULT_LUNCH + '.',
-      default=DEFAULT_LUNCH)
+    add_root_argument(parser)
+    parser.add_argument('--lunch',
+                        help='Build menu. ' + 'Defaults to ' + DEFAULT_LUNCH +
+                        '.',
+                        default=DEFAULT_LUNCH)
+
 
 def run_through_aosp_helper(lunch, args, cwd):
-  args[0:0] = [AOSP_HELPER_SH, lunch]
-  check_call(args, cwd = cwd)
+    args[0:0] = [AOSP_HELPER_SH, lunch]
+    check_call(args, cwd=cwd)