import { assert_notmatch } from "https://deno.land/x/denops_std@v3.6.0/function/vim/mod.ts";
The opposite of assert_match(): add an error message to
|v:errors| when {pattern} matches {actual}.
Also see |assert-return|.
Can also be used as a |method|:
getFile()->assert_notmatch('bar.*')