#12 underscores in maths get parsed as color commands

[sam tygier]

I am using wiki2beamer version: 0.9.5 (Fedora 20 package wiki2beamer-0.9.5-6.fc20.noarch).

* $J_x  J_b  J_c$

gets converted to

\item $J\textcolor{x  J}{b  J}c$

To suppress this I have to use

* $J_{x}  J_{b}  J_{c}$

This looks like http://sourceforge.net/p/wiki2beamer/bugs/4/ , but that was marked as fixed years ago.

[Valentin Haenel]

I think the original fix simply looked for a {.*} after and underscore and didn't check for a viable color name.