Add test to verify custom tags are used in partials for via `.render()`
Add test to verify custom tags are used in partials for via `.render()`

phillipj/mustache.js,phillipj/mustache.js,janl/mustache.js,phillipj/mustache.js,janl/mustache.js,janl/mustache.js,phillipj/mustache.js,janl/mustache.js,phillipj/mustache.js,janl/mustache.js