A demo document (linked from the Scribble manual) demonstrates how
to trigger each style class and what it looks like with the default
and manual styles.
original commit: 5e0182029fea2d79e22d515305654a79a881e6d3
The "racket" directory contains a pared-back version of the
repository, roughly.
The "pkgs" directory everything else in the repository, but
organized into packages.
original commit: b2ebb0a28bf8136e75cd98316c22fe54c30eacb2