Update gmock_output_test.py
diff --git a/googlemock/test/gmock_output_test.py b/googlemock/test/gmock_output_test.py
index c8af0f9..20323e1 100755
--- a/googlemock/test/gmock_output_test.py
+++ b/googlemock/test/gmock_output_test.py
@@ -29,7 +29,7 @@
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-"""Tests the text output of Google C++ Mocking Framework.
+r"""Tests the text output of Google C++ Mocking Framework.
To update the golden file:
gmock_output_test.py --build_dir=BUILD/DIR --gengolden
