Improves gtest's failure messages. In particulars, char pointers and

char arrays are not escapped properly.

test/gtest_output_test_.cc

@@ -27,8 +27,11 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 //
-// A unit test for Google Test itself.  This verifies that the basic
-// constructs of Google Test work.
+// The purpose of this file is to generate Google Test output under
+// various conditions.  The output will then be verified by
+// gtest_output_test.py to ensure that Google Test generates the
+// desired messages.  Therefore, most tests in this file are MEANT TO
+// FAIL.
 //
 // Author: wan@google.com (Zhanyong Wan)
 
@@ -101,6 +104,16 @@ INSTANTIATE_TEST_CASE_P(PrintingFailingParams,
                         FailingParamTest,
                         testing::Values(2));
 
+static const char kGoldenString[] = "\"Line\0 1\"\nLine 2";
+
+TEST(NonfatalFailureTest, EscapesStringOperands) {
+  std::string actual = "actual \"string\"";
+  EXPECT_EQ(kGoldenString, actual);
+
+  const char* golden = kGoldenString;
+  EXPECT_EQ(golden, actual);
+}
+
 // Tests catching a fatal failure in a subroutine.
 TEST(FatalFailureTest, FatalFailureInSubroutine) {
   printf("(expecting a failure that x should be 1)\n");