This PR fixes a few issues with squares and lozenges
I'm pretty sure \blacklozenge was an error/typo, I've changed it to U+29EB ⧫
I've changed \square to be white by default (as it is in LaTeX), and fixed both to be the same size (in some fonts anyway). At any rate, \square and \blacksquare should probably be 0x25A0 (black square) and 0x25A1 (white square) respectively.
This PR fixes a few issues with squares and lozenges
\blacklozengewas an error/typo, I've changed it to U+29EB ⧫\squareto be white by default (as it is in LaTeX), and fixed both to be the same size (in some fonts anyway). At any rate,\squareand\blacksquareshould probably be 0x25A0 (black square) and 0x25A1 (white square) respectively.