Add amatrix style to the stylesheet that formats a table to look like a matrix.

Heavily based on the style used bymatrepr, but with some tweaks to make it work within the Sphinx/Bootstrap styles.

Usage

Add a

:class: matrix

directive to any table. This is stackable with other classes, for example:class: inline matrix includes both inline and matrix styles.

If the matrix has row indices, then also add:stub-columns: 1 to mark the leftmost column as a header. This way the leftmost column is styled as indices, but more importantly the matrix border will be in the correct place (i.e. the indices are outside the matrix).

Example:

..csv-table::A:class: inline matrix:header: ,0,1,2,3:stub-columns: 1

Effect

Becomes

Closes#496