make run_test look like run_tests

Dependencies

• [2] 5ZCQGZP5 save 2 more alternate formats for test failures
• [3] D5J7IZAD debug helper: run a single test
• [4] AVTNUQYR basic test-enabled framework
• [5] JNJ4R56X support running tests multiple times
• [6] 3QMTXKWN rename
• [*] 3QNOKBFM beginnings of a test harness

Change contents

• replacement in app.lua at line 441
  [3.41]→[3.41:69](∅→∅)
  − function App.run_test(test)
  [3.41]

  [3.69]
  + function App.run_test(test, record_error_fn)
• replacement in app.lua at line 445
  [3.143]→[2.107:187](∅→∅)
  − xpcall(test, function(err) record_error_with_heuristic_location('', err) end)
  [3.143]

  [3.2065]
  + xpcall(test, function(err) record_error_fn('', err) end)