There seems to be an error in Atto's equation editor - the advanced tab contains a button which is supposed to enter a matrix:
However, the button (and the Tex code inserted) is missing one backslash, and as a result - is not displaying the matrix correctly. The code should be:
I looked through the equation editor's files and found a place which seems to hold the buttons - in the /lib/editor/atto/plugins/equation/settings.php file:
However, as you can see, the Tex code in that file is correct But the code entered via the button is not.
Moreover, when I tried to edit the /lib/editor/atto/plugins/equation/settings.php file, my changes were not reflected in the editor (purging caches did not help). Is there another place I should edit?