#4694 lurkmathml does not know how to typeset box

[Leo Butler]

At present, a box expression is simply typeset with mbox or mlabox as the operator:

mathml(box(x^2+y^2=1));

produces

 <math xmlns="http://www.w3.org/1998/Math/MathML"> <mi>mbox</mi> 
 <mrow><mo>(</mo><msup><mrow><mi>y</mi> </mrow> <mn>2</mn> </msup> <mo>+</mo> 
 <msup><mrow><mi>x</mi> </mrow> <mn>2</mn> </msup> <mo>=</mo> <mn>1</mn> 
 <mo>)</mo></mrow> </math>

rendered as

$\mathrm{mbox}(y^2+x^2=1)$

and similar for a labelled box.

[Leo Butler]

Fixed in commit b78b96e89.