There's one major and one minor category still unfixed:
doctests are the major category (and I hope to be able to augment the
refactoring tool to refactor bona fide doctests soon);
other code generating print statements in strings is the minor category.
(Oh, and I don't know if the compiler package works.)
implement its locking scheme, this module implements a crude link() by
way of copying the source to the destination provided the destination
doesn't already exist.
