texmath-0.13.2: test/writer/starmath/054_bmatrix_environment.test
<<< tex
\begin{bmatrix}a&b\\c&d\end{bmatrix}
>>> starmath
left [ matrix { a # b ## c # d } right ]
<<< tex
\begin{bmatrix}a&b\\c&d\end{bmatrix}
>>> starmath
left [ matrix { a # b ## c # d } right ]