Merge pull request #255 from zmkoo000/patch-1

fix typo

notes/代码可读性.md

@@ -95,7 +95,7 @@ Map<String, Integer> scoreMap = new HashMap<>();
 ```
 
 ```java
-// Student' name -> Student's score
+// Student's name -> Student's score
 Map<String, Integer> scoreMap = new HashMap<>();
 ```