Integration of MathJax, KaTeX and Asymptote with scribble, to typeset math in Racket documentation

Davide P. Cervone 266328ebca Fix a problem with IE when parentNode is null. ... Apparently IE removes empty text nodes, and so the open.parentNode can be null. So check before trying to remove the node. This resolves the issue raised by https://sourceforge.net/projects/mathjax/forums/forum/948700/topic/3902096		2010-10-20 22:46:30 -04:00
mathjax	Fix a problem with IE when parentNode is null.	2010-10-20 22:46:30 -04:00
mathjax-dev	Update to remove warnings about VERSION not being used	2010-08-10 12:01:12 +00:00