texmath-0.12.5: test/writer/eqn/msub-11.test

<<< native
[ ESub (EIdentifier "H") (ESymbol Ord "2")
, ESymbol Rel "="
, EOver
    False
    (ESub (EIdentifier "H") (ESymbol Ord "2"))
    (EPhantom (EIdentifier "x"))
]
>>> eqn
H sub 2 = {H sub 2} to {hphantom x}