ensure list of event names is flat #118

All 647 tests pass in 7m 4s

647 tests ±0 647 ✔️ ±0 7m 4s ⏱️ - 3m 3s
    1 suites ±0     0 💤 ±0
    1 files ±0     0 ❌ ±0

Results for commit c6d83bc. ± Comparison against earlier commit 30464ee.