test: replace string concatenation with template

PR-URL: https://github.com/nodejs/node/pull/16914
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>

test/parallel/test-assert.js

@@ -690,7 +690,7 @@ try {
         code: 'ERR_INVALID_ARG_TYPE',
         type: TypeError,
         message: 'The "block" argument must be of type function. Received ' +
-                 'type ' + typeName(block)
+                 `type ${typeName(block)}`
       })(e);
     }