4.0.0 及之后版本不支持 watch 构造函数

https://github.com/alibaba/arthas/pull/2658 引入的Bug。 @Allan-QLB

下面这两个命令都会识别为重定向：

```
watch demo.MathGame ''
watch demo.MathGame
```

```java
@Test
public void testSeparateRedirect2() {
String[] expectedTextTokenValue = new String[]{"watch", "demo.MathGame", ""};
String cmd = "watch demo.MathGame ''";
List actualTokens = CliTokenImpl.tokenize(cmd);
assertEqualsIgnoreBlank(expectedTextTokenValue, actualTokens);
Assert.assertEquals(cmd, concatRaw(actualTokens));
}
```

Start with testSeparateRedirect2 and the CliTokenImpl.tokenize entry point shown in the issue, reproducing both watch commands. Check that the resulting tokens are watch, demo.MathGame, and , and that concatRaw preserves the original command without treating as redirection.

Written by the indexing model from the issue text.