I'm got a fork here ignores rules whose name starts with an underscore

[pragdave]

The idea is that it cleans up diagrams by removing all the _ and __ space matchers (and any other rules that start with _).

Would you be interested in a PR?

[dundalek]

I think it might be useful as a generic transformer that could be optionally added to the pipeline. It could take a function predicate as a parameter to indicate which rules to ignore. In your case it would check for underscores in the rule name, but others could specify different check.