Document combining JSON constants
Document combining JSON constants

Working out how to do this took Slack and StackOverflow. Documenting so others know what to do.
nicolas-grekas/Twig,twigphp/Twig,twigphp/Twig,nicolas-grekas/Twig,nicolas-grekas/Twig,nicolas-grekas/Twig,twigphp/Twig,nicolas-grekas/Twig