Twiki has/had a plugin that allowed you to author graphviz dot diagrams inline. It would be really cool to support writing something like this in the github wikis:
```graphviz-digraph
digraph G {
main -> parse -> execute;
main -> init;
main -> cleanup;
execute -> make_string;
execute -> printf
init -> make_string;
main -> printf;
execute -> compare;
}
And inline getting this in the preview/output:
