@mathjax/src
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    Variable REMOVEConst

    REMOVE: "[-]" = '[-]'

    Used to remove elements from an array in default options E.g., an option of the form

    { name: {[REMOVE]: [2]} }

    where 'name' is an array in the default options would end up with name having its original value but with any entry of 2 removed So if the original value was [1, 2, 3, 2], then the final value will be [1, 3] instead.