Typo fix in mock.patch.

Patch from https://github.com/testing-cabal/mock/issues/215

Lib/unittest/mock.py

@@ -1480,7 +1480,7 @@ def patch(
     used.
 
     A more powerful form of `spec` is `autospec`. If you set `autospec=True`
-    then the mock with be created with a spec from the object being replaced.
+    then the mock will be created with a spec from the object being replaced.
     All attributes of the mock will also have the spec of the corresponding
     attribute of the object being replaced. Methods and functions being
     mocked will have their arguments checked and will raise a `TypeError` if