Python style fixes + unused imports removal in git cl and friends.

R=sergiyb@chromium.org
BUG=

Change-Id: I9b886100557bf6efa9be07d40175f7bb919f5294
Reviewed-on: https://chromium-review.googlesource.com/432456
Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Andrii Shyshkalov <tandrii@chromium.org>
diff --git a/tests/git_cl_test.py b/tests/git_cl_test.py
index 37de5c8..2542d62 100755
--- a/tests/git_cl_test.py
+++ b/tests/git_cl_test.py
@@ -703,7 +703,7 @@
         '--cc', ','.join(['joe@example.com'] + cc),
     ] + (['--private'] if private else []) + [
         '--git_similarity', similarity or '50'
-    ] + (['--git_no_find_copies'] if find_copies == False else []) + [
+    ] + (['--git_no_find_copies'] if find_copies is False else []) + [
         'fake_ancestor_sha', 'HEAD'
     ]
 
@@ -2741,7 +2741,7 @@
     self.assertEqual(cl._GetChangeDetail(), 'a')  # Miss.
     self.assertEqual(cl._GetChangeDetail(), 'a')
     self.assertEqual(cl._GetChangeDetail(issue=2), 'b')  # Miss.
-    self.assertEqual(cl._GetChangeDetail(issue=2, no_cache=True), 'b2') # Miss.
+    self.assertEqual(cl._GetChangeDetail(issue=2, no_cache=True), 'b2')  # Miss.
     self.assertEqual(cl._GetChangeDetail(), 'a')
     self.assertEqual(cl._GetChangeDetail(issue=2), 'b2')