test: improve assertions in test-repl-unsupported-option.js

PR-URL: #44953
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Minwoo Jung <nodecorelab@gmail.com>
Reviewed-By: Kohei Ueno <kohei.ueno119@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/parallel/test-repl-unsupported-option.js

@@ -7,4 +7,5 @@ const { spawnSync } = require('child_process');
 
 const result = spawnSync(process.execPath, ['-i', '--input-type=module']);
 
-assert.match(result.stderr.toString(), /Cannot specify --input-type for REPL/);
+assert.strictEqual(result.stderr.toString(), 'Cannot specify --input-type for REPL\n');
+assert.notStrictEqual(result.exitCode, 0);