This is a testharness.js-based test.
[FAIL] Explicitely-defined consecutive columns spanned by the same set of cells are not merged
  assert_equals: expected 75 but got 50
[FAIL] Explicitely-defined consecutive columns spanned by the same set of cells are not merged, and cells span across border-spacing
  assert_equals: expected 12.5 but got 50
[FAIL] Explicitely-defined consecutive rows spanned by the same set of cells are not merged, and cells span across border-spacing
  assert_equals: expected 12.5 but got 0
Harness: the test ran to completion.