Update README-zh.md

Author: JessYanCoding

README-zh.md

@@ -131,15 +131,13 @@ public class CustomAdaptActivity extends AppCompatActivity implements CustomAdap
         return 667;
     }
 }
-
 ```
 
 * **当某个 Activity 想放弃适配，请实现 CancelAdapt 接口**
 ```java
 public class CancelAdaptActivity extends AppCompatActivity implements CancelAdapt {
 
 }
-
 ```
 
 ### Fragment
@@ -162,15 +160,13 @@ public class CustomAdaptFragment extends Fragment implements CustomAdapt {
         return 667;
     }
 }
-
 ```
 
 * **当某个 Fragment 想放弃适配，请实现 CancelAdapt 接口**
 ```java
 public class CancelAdaptFragment extends Fragment implements CancelAdapt {
 
 }
-
 ```
 
 ### Subunits (请认真看 demo-subunits，里面有详细介绍)