texmath-0.6.7: tests/writers/mover-08.tex
\overset{\mathrm{over\ script}}{\mathrm{\_\ \ baseline\ \_\ }}=\overset{\mathrm{over\ script}}{\underset{\phantom{\mathrm{fail}}}{\mathrm{\_\ \ baseline\ \_\ }}}\overset{\mathrm{over\ script}}{\mathrm{\_\ \ baseline\ \_\ }}=\overset{\mathrm{over\ script}}{\underset{\phantom{\mathrm{fail}}}{\mathrm{\_\ \ baseline\ \_\ }}}