texmath-0.13.2: test/writer/starmath/053_pmatrix_environment.test
<<< tex
\begin{pmatrix}a&b\\c&d\end{pmatrix}
>>> starmath
left ( matrix { a # b ## c # d } right )
<<< tex
\begin{pmatrix}a&b\\c&d\end{pmatrix}
>>> starmath
left ( matrix { a # b ## c # d } right )