Update README.rst

Author: matclayton

README.rst

@@ -193,9 +193,11 @@ control group - there is no way to differentiate between these cases.
 You can also weight the experiments using the following techniques
 
 ::
+
    alternative = participant(request).enroll('example_test', {'control': 99, 'v2': 1})
 
 ::
+
    {% experiment example_test control 99 %}v2{% endexperiment %}
    {% experiment example_test v2 1 %}v2{% endexperiment %}