Test `backtickcode`
<syntax>bookmark</syntax>
Todo* add variant info to html syntax table* convert mtx-wikipage to expat parser* add mtx-wikipage to extension* cleanup and put snippets on server* see what can be done about auto-instantiation of command pages* document the new stuff (ref pages, env/cmd split, variants)* fix/extend the <texcodenowiki>\bookmark\\ {voor mezelf{cmd}} and {{env}}</texcodenowiki>templates* existing page merging (jikes!)