texmath-0.7: tests/writers/munderover-03.tex
\underset{under\ script}{\overset{\phantom{fail}}{\_\ baseline\ \_}} = \underset{under\ script}{\_\ baseline\ \_}
\underset{under\ script}{\overset{\phantom{fail}}{\_\ baseline\ \_}} = \underset{under\ script}{\_\ baseline\ \_}