- Move render.Rpt to test.Report
- Remove report/report_fixture_test.go; it was unused
- Remove report fixture in app/ and make tests use test.Report
- Move expected outputs into render/expected, so they can be reused
- Use constructors instead of ScopeDelim everywhere
- Use constructors instead of IDDelim everywhere
- IDDelim is renamed EdgeDelim, for clarity
- Partial import of the new test fixtures, to be completed later