id: no-assert-tuple
valid:
  - 'assert True'
  - 'assert x == 1'
  - 'assert x, "message"'
  - 'assert (x == 1), "message"'  # explicit grouping, not a tuple
invalid:
  - 'assert (1, 2)'
  - 'assert (x, y)'
  - 'assert (1, 2, 3), "message"'
  - |
    def f():
        assert (a, b)