Adds missing copyright in test/gtest-test-part_test.cc (by Markus Heule). Minor format adjustments.

test/gtest_output_test_.cc

@@ -974,6 +974,10 @@ int main(int argc, char **argv) {
   // We just run the tests, knowing some of them are intended to fail.
   // We will use a separate Python script to compare the output of
   // this program with the golden file.
+
+  // It's hard to test InitGoogleTest() directly, as it has many
+  // global side effects.  The following line serves as a sanity test
+  // for it.
   testing::InitGoogleTest(&argc, argv);
   if (argc >= 2 &&
       String(argv[1]) == "--gtest_internal_skip_environment_and_ad_hoc_tests")