texmath-0.12.5: test/writer/tex/munder9.test

<<< native
[ EUnder False (EIdentifier "x") (ESymbol Accent "\8412")
, ESymbol Rel "\8800"
, EUnder False (EIdentifier "x") (ESymbol Accent "\8412")
, ESymbol Rel "="
, EUnder False (EIdentifier "x") (ESymbol Accent "\8412")
, ESymbol Rel "="
, EUnder False (EIdentifier "x") (ESymbol Accent "\8412")
]
>>> tex
\underset{\ddddot{}}{x} \neq \underset{\ddddot{}}{x} = \underset{\ddddot{}}{x} = \underset{\ddddot{}}{x}