diff --git a/docs/notes/30. 优先使用泛型方法.md b/docs/notes/30. 优先使用泛型方法.md
index a4d7b0a..9373d79 100644
--- a/docs/notes/30. 优先使用泛型方法.md	
+++ b/docs/notes/30. 优先使用泛型方法.md	
@@ -114,18 +114,13 @@ public static <E extends Comparable<E>> E max(Collection<E> c);
 ```java
 // Returns max value in a collection - uses recursive type bound
 public static <E extends Comparable<E>> E max(Collection<E> c) {
-
-    if (c.isEmpty())
-        throw new IllegalArgumentException("Empty collection");
-
-    E result = null;
-
-    for (E e : c)
-        if (result == null || [e.compareTo(result](http://e.compareTo(result)) > 0)
-            result = Objects.requireNonNull(e);
-
-    return result;
-
+  if (c.isEmpty())
+    throw new IllegalArgumentException("Empty collection");
+  E result = null;
+  for (E e : c)
+    if (result == null || e.compareTo(result) > 0)
+      result = Objects.requireNonNull(e);
+  return result;
 }
 ```