Assertion failed
assert(1 != 1)
         |
         false

Assertion failed
assert(" != " != " != ")
              |
              false

Assertion failed
assert(
    " != "

            !=
            |
            false

            " != "
)

Assertion failed
assert(1/*!=*/!=/*!=*/1)
              |
              false

Assertion failed
assert((1 != 1) != false)
          |     |
          |     false
          false