test: use long object to verify breakLength Infinity bypasses line splits

Author: hamidrezaghavami

test/parallel/test-util-inspect.js

@@ -4059,8 +4059,8 @@ ${error.stack.split('\n').slice(1).join('\n')}`,
   delete Error[Symbol.hasInstance];
 }
 
-{ // test case
-  const obj = { a: 1, b: 2, c: 3, d: 4 };
+{
+  const obj = { long: 'a'.repeat(100), another: 'b'.repeat(100) };
   const result = util.inspect(obj, { breakLength: Infinity });
-  assert.strictEqual(result, '{ a: 1, b: 2, c: 3, d: 4 }');
-}
+  assert.strictEqual(result.includes('\n'), false);
+}