scholdoc-texmath-0.1: tests/writers/mtableBsize2.tex
\begin{array}{lll}
H & \rightarrow & G \\
\downarrow & \mspace{54mu} & \downarrow \\
K & \rightarrow & L \\
\end{array}
\begin{array}{lll}
H & \rightarrow & G \\
\downarrow & \mspace{54mu} & \downarrow \\
K & \rightarrow & L \\
\end{array}