brucemiller/LaTeXML — pull request #523 by fred-wang (2014-09-09 19:00:16+00:00)
Title: \underbrace & \overbrace: use the horizontal curly brackets from the Mat...

...hML 3 operator dictionary #522

I didn't find existing tests but verified that the braces are converted to the right unicode character and rendered correctly in Gecko + Latin Modern Math. I got test failures with babel, but that's probably related to the other issues with that package...