Techdebt: Sure - Documentation (#6051)

docs/docs/contributing/development_tips/tests.rst

@@ -17,9 +17,9 @@ When writing negative tests, try to use the following format:
   with pytest.raises(botocore.exceptions.ClientError) as exc:
       client.failing_call(..)
   err = exc.value.response["Error"]
-  # These assertions use the 'sure' library, but any assertion style is accepted
-  err["Code"].should.equal(..)
-  err["Message"].should.equal(..)
+  # Use the pytest assert method, see https://docs.pytest.org/en/stable/how-to/assert.html#
+  assert err["Code"] == ..
+  assert err["Message"] == ..
 
 This is the best way to ensure that exceptions are dealt with correctly by Moto.