notebook: '%html $x<y$' doesn't work right #4316
Description
If I type
%html some math: $x<y$.
in the notebook, then the "<y" gets swallowed. (If I "Edit" the worksheet, I see
<html><font color='black'>some math: <span class="math">x<y</span>.</font></html>
but in the worksheet view I see "some math: x.")
Putting a space between "<" and "y" fixes the problem. Also,
%html some math: $x<6y$.
works just fine, and the same with
Is this related to (or the same problem as) #4245?
Component: notebook
Keywords: notebook, %html
Issue created by migration from https://trac.sagemath.org/ticket/4316