Tests inheritance for <mtext> with various token attributes.
<math xmlns="http://www.w3.org/1998/Math/MathML">
<mstyle fontsize="18pt" fontweight="bold" fontstyle="italic" fontfamily="Helvetica">
<mtext>Theorem 1:</mtext>
</mstyle>
</math>
Author: Robert Miner and Jeff Schaefer, Geometry Technologies
