[AUCTeX-devel] Don't fold braces and brackets in math mode

[Mosè Giordano]

Hi all,

consider the following math environment:

--8<---------------cut here---------------start------------->8---
\begin{equation}
  \alpha[b]{c}
\end{equation}
--8<---------------cut here---------------end--------------->8---

It's folded to

--8<---------------cut here---------------start------------->8---
\begin{equation}
  α
\end{equation}
--8<---------------cut here---------------end--------------->8---

because the square brackets and braces are interpreted by AUCTeX as
arguments to the `\alpha' macro, but most of the commands to be folded
in math modes (e.g. greek letters) don't take arguments and square
brackets are often used as they are.

The attached patch fixes this issue by ignoring square brackets and
curly braces in math mode.  Comments welcome.

Bye,
Mosè

math-folding.patch
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