Set TeX class OP for multi-letter mo elements, as in v2. (mathjax/MathJax#3095) #998
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In version 2, an
mowith multiple letters, like<mo>Hom</mo>, would be given the TeX class of OP when it doesn't appear explicitly in the operator table. This was lost in the v3 translation, and this PR reinstates that. In addition, it refactors the code that does the checking, since it is used in two places (theget texClass()getter, and thecheckOperatorTable()initialization routine. It also adjusts thegetRange()function in theOperatorTable.tsto always return a value.The pattern used to identify a multi-letter operator is a property of the
MmlMoobject, so that it can be adjusted during initialization, if desired.Resolves issue mathjax/MathJax#3095.