import { assert_notequal } from "https://deno.land/x/denops_std@v4.1.4/function/vim/mod.ts";
The opposite of assert_equal(): add an error message to
|v:errors| when {expected} and {actual} are equal.
Also see |assert-return|.
Can also be used as a |method|:
mylist->assert_notequal([1, 2, 3])