Merge pull request #687 from ice-world/master

感谢！补全缺失的括号

Author: jiangzhonglian

docs/2.0/tutorials/beginner/basics/buildmodel_tutorial.md

@@ -222,7 +222,7 @@ pred_probab = softmax(logits)
 print(f"Model structure: {model}\n\n")
 
 for name, param in model.named_parameters():
-    print(f"Layer: {name} | Size: {param.size()} | Values : {param[:2]} \n"
+    print(f"Layer: {name} | Size: {param.size()} | Values : {param[:2]} \n")
 ```
 
 输出: