<mathml:operator> Fix named space normalization.
<mathml:operator> Fix named space normalization.

janmarthedal/mathml2svg,gjtorikian/lasem,gjtorikian/lasem,wavewave/lasem,janmarthedal/mathml2svg,gjtorikian/lasem,wavewave/lasem,wavewave/lasem,janmarthedal/mathml2svg,wavewave/lasem,gjtorikian/lasem,janmarthedal/mathml2svg