Underbraces

[adius]

I think underbraces should be part of core AsciiMath.

This was already discussed in this issue: mathjax/MathJax#741

[drlippman]

I'm fine with that. Should we just go with the "ubrace" token @dpvc suggested in 741?

[adius]

I think we should support both underbrace and ubrace, as some might favour readability over length, shouldn't we?

[drlippman]

While the new symbol that @dpvc suggested in 741 is sufficient to get an underbrace, it doesn't appear sufficient to get ubrace(1+2+3+4)_("4 terms") to work. I'll see if I can figure a way to get the proper munder tag.