test: display better error message for assertion

test: display better error message for assertion · nodejs/node@1690746

Original file line number	Diff line number	Diff line change
`@@ -129,5 +129,5 @@ const gunz = zlib.createGunzip();`
`129`	`129`	`inp.pipe(gzip).pipe(gunz).pipe(out);`
`130`	`130`
`131`	`131`	`out.on('data', common.mustCall((c) => {`
`132`		`-assert.strictEqual(c, inp._hash, 'hashes should match');`
	`132`	+assert.strictEqual(c, inp._hash, `Hash '${c}' equals '${inp._hash}'.`);
`133`	`133`	`}));`