nx_mathml_gate.nx

nx_mathml_gate.nx -- IS THE SOVEREIGN LATEX->MATHML TYPESETTER CORRECT, AND CAN IT REFUSE? The teeth are structural facts about the emitted markup, not stored golden strings: a golden string records that its author agreed with the code on the day they wrote it, whereas "a superscript produces an msup element" is true of any correct implementation and false of any wrong one. THE REFUSALS ARE THE LOAD-BEARING HALF. A typesetter that silently drops what it cannot read produces a formula that is wrong in a way the reader cannot see -- worse than no formula at all -- so an unknown command, an unbalanced brace and a short buffer each have their own negative control, and each asserts WHICH rule fired rather than merely that something was refused. license_tier: ORIGINAL expect_exit: 0