Add tests for pattern/def->var
Add tests for pattern/top-level?
Add tests for pattern/fn?

Also pull out a common test case
Add tests for pattern/fn->name
Add :internal-name case to fn->name-tests
Add tests for pattern/let?
Add tests covering pattern/letfn?
Rework existing tests to add checks over all ops
Add tests of pattern/binding?
Add tests of pattern/binding->symbol
FIXME wrt. testing pattern/binding->value
Add tests of pattern/local?
Whitespace
Add tests over oxcart.util/*
Remove the unused bindings library
Add tests over oxcart.passes/*