[twig mode] Replace confusing/broken code in demo
[twig mode] Replace confusing/broken code in demo

pabloferz/CodeMirror,hackmdio/CodeMirror,nightwing/CodeMirror,hackmdio/CodeMirror,nightwing/CodeMirror,hackmdio/CodeMirror,nightwing/CodeMirror,dperetti/CodeMirror,dperetti/CodeMirror,wingify/CodeMirror,wingify/CodeMirror,pabloferz/CodeMirror,codio/CodeMirror,dperetti/CodeMirror,codio/CodeMirror,pabloferz/CodeMirror,codio/CodeMirror,wingify/CodeMirror