texmath-0.7: tests/writers/mover-08.tex
\overset{over\ script}{\_\ baseline\ \_} = \overset{over\ script}{\underset{\phantom{fail}}{\_\ baseline\ \_}}
\overset{over\ script}{\_\ baseline\ \_} = \overset{over\ script}{\underset{\phantom{fail}}{\_\ baseline\ \_}}