## Changes
- Instead of doing 2 passes on variable resolution, do a loop until
there are no more updates (or we reach count 100).
- Stacked on top of #2163 which is a regression test for this:
acceptance/bundle/variables/complex-transitive-deep
## Tests
Existing tests, new regression tests.
These tests already passed before, added for completeness:
- acceptance/bundle/variables/cycle
- acceptance/bundle/variables/complex-cross-ref
Denis Bilenko