[doc] mock is part of unittest in Python 3

Change-Id: I982ba1a7e84d258a3588067698158b40484ca54e
---
M tests/README.rst
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/README.rst b/tests/README.rst
index 7d10f89..7f84377 100644
--- a/tests/README.rst
+++ b/tests/README.rst
@@ -266,7 +266,7 @@
   @require_modules(['important1', 'musthave2'])
   def test_require_modules(self):
 
-@(unittest.)mock.patch
+@unittest.mock.patch
 -----------------------
 Replaces `target` with object specified in `new`. Refer to mock's documentation.
 This is especially useful in tests, where requests to third-parties should be

