bug#54949: 13.1.2; Indentation for matrix environments

[Robert Morelli]

The only way I can get the indentation to work with matrix environments
like matrix, bmatrix, etc. is to start the line with \begin{matrix}. For
instance, putting:
Let $E = \begin{bmatrix}
1 & 0\\
0 & 1
\end{bmatrix}$ be the
identity matrix.
results in the indentation being offset for the remainder of the file.

Emacs : GNU Emacs 28.1 (build 1, x86_64-apple-darwin18.7.0, NS 
appkit-1671.60 Version 10.14.6 (Build 18G95))
of 2022-04-04
Package: 13.1.2

current state:
==============
State could not be dumped due to the following error:

(void-function ,)

You should still send this bug report.

--
Robert Morelli
Department of Mathematics
Salt Lake Community College