Vertical line in Mathjax maths when using HTML question type

[jmtrik]

There is a known bug in the version of mathjax that is used on TA. It causes vertical lines to be displayed on the right-hand side of all typeset maths. This only happens in the HTML questions type.

To fix it add this to your Question CSS.

.MathJax nobr>span.math>span {
   border-left-width:0 !important
};