Rendering tilde above the character in latexmath

[anermina]

Tilde symbol gets rendered before the character, instead over it when using latexmath.

Original:

Generated:

Hat and bar are generated correctly, while the issue is also present with dot and ddot.

Example:

[latexmath%unnumbered]
++++
\tilde{\tilde{x}} + \dot{b} + \bar{d} + \hat{g} + \tilde{m} + \ddot{s}
++++

Originally posted in https://github.com/metanorma/iso-10303-detached-docs/issues/108

[opoudjis]

We are translating LaTeX into MathML as our standard representation, so the issue here is bad translation into MathML. \tilde{\tilde{x}} (which is a double tilde) is being translated as the horrifically naive:

<mrow><mi>̃</mi><mrow><mi>̃</mi><mrow><mi>x</mi></mrow></mrow>

i.e. tilde followed by x. Hat and bar are the only instances parsed as accents, and even they aren't parsed satisfactorily:

<mover><mrow><mi>d</mi></mrow><mo stretchy="true">¯</mo></mover>

<mover accent="true"><mi>g</mi><mo stretchy="false">̂</mo></mover