Android Studio - 非法字符 8204 错误

由于某种原因，在重建我的项目后，我收到非法字符错误，但我的代码中没有任何内容以红色下划线显示。有人可以告诉我出了什么问题以及如何解决吗？

Error

illegal character: \8204

WCBankActivity.java

import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.ActionBarActivity;

public class WCBankActivity extends ActionBarActivity {

    public final static String EXTRA_MESSAGE = "Station_key";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.fragment_wc_bank);

        if (savedInstanceState == null) {
            Intent intent = getIntent();
            String station = intent.getStringExtra(WCBankActivity.EXTRA_MESSAGE);

            FragmentWCBank newFragment = new FragmentWCBank();
            FragmentTransaction transaction = this.getSupportFragmentManager().beginTransaction();‌
            transaction.replace(R.id.detail_container, newFragment);
            transaction.commit();
        }
    }
}

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