A boiled down example from Anthony's MIME torture tests.  This one has a separating boundary for an outer part inside an inner part.
A boiled down example from Anthony's MIME torture tests.  This one has a
separating boundary for an outer part inside an inner part.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator