,
          {
            title: '<kbd>matrix*<kbd> Spacing',
            latex: `\\left|
            \\begin{matrix*}
                \\rule{1em}{1em}&\\rule{1em}{1em}\\\\
                \\rule{.5em}{1em}&\\rule{.5em}{1em}\\\\
            \\end{matrix*}
            \\right|`,
          },

          {
            title: 'Matrix: Column Separator in Embedded Array',
            class: 'fail',
            latex: `-\\begin{align}
                - &= -\\begin{array}{|r} \\displaystyle \\frac12 \\end{array}
 