texmath-0.13.1: test/regression/280.test

<<< tex
\boldsymbol{\Gamma + b + \alpha}
>>> mml
<?xml version='1.0' ?>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <mi mathvariant="bold">𝚪</mi>
    <mo mathvariant="bold">+</mo>
    <mi mathvariant="bold-italic">𝒃</mi>
    <mo mathvariant="bold">+</mo>
    <mi mathvariant="bold-italic">𝜶</mi>
  </mrow>
</math>