$LTS is coming out as literal '<'

[Alex-Jordan]

In PGbasicmacros, $LTS is defined to output < in HTML. Good.

And yet with the following MWE:

DOCUMENT();
loadMacros("PGstandard.pl");

BEGIN_TEXT
Write a vector like this: <a, b, c>
$BR
Write a vector like this: ${LTS}a,b,c${GTS}
END_TEXT

ENDDOCUMENT();

The places where $LTS and $GTS are used are coming out as literal < and >. The web browser then tries to parse the "tag" <a,b,c> and the user sees nothing there. So I think there is some translation step that is improperly converting < to < before the rendered problem is sent out.

[drgrice1]

I assume you are using the default MathJax display mode which means the HTML_MathJax display mode for PG internally. The fail over order for the HTML_MathJax display mode is first "HTML_dpng", then "HTML_tth", then "HTML".

The $LTS variable is defined to be the result of calling the LTS subroutine with returns MODES(TeX => '<', HTML => '&lt;', HTML_tth => '<', PTX => '\lt');.

That means that the definition of the $LTS variable when the display mode is HTML_MathJax is actually <, and not < because the first defined fail over is HTML_tth.

This is noted in issue #473, and also noted at https://wiki.openwebwork.org/wiki/Installation_Manual_for_2.20_on_Ubuntu#PGbasicmacros.pl.