msub-02

Formatting of right hand side of equation should be identical to formatting of left hand side

W3C sample	WIRIS
	$${\phantom{\mathrm{fail}}X}_0=X_0$$

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
  <msub>
    <mrow>
      <mphantom>
        <mi>fail</mi>
      </mphantom>
      <mi>X</mi>
    </mrow>
    <mn>0</mn>
  </msub>
  <mo>=</mo>
  <msub>
    <mi>X</mi>
    <mn>0</mn>
  </msub>
</math>

Author: George Chavchanidze, Opera Software ASA