Update the test suite
Clean up UnitLargeDoc style to be like rest of test-suite
Put large_doc test (slowest) last
Add failing test for large vcat
Improve test-suite, merging in GHC tests
remove some unused helper functions from test-suite
Fix tests for latest quickcheck.
Update tests to pass (by marking some as fail [HACK])
Move 'test' to 'tests'