ObjMatrix  Diff

/*
 * Copyright (c) 2020, Jonathan Schleifer <js@nil.im>
 * Copyright (c) 2020, 2021, Jonathan Schleifer <js@nil.im>
 *
 * https://fossil.nil.im/objmatrix
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice is present in all copies.
 *