Update avl_tree

codes/csharp/chapter_tree/avl_tree.cs

@@ -9,7 +9,7 @@ using NUnit.Framework;
 
 namespace hello_algo.chapter_tree
 {
-    // Tree class
+    /* AVL 树 */
     class AVLTree
     {
         public TreeNode? root; // 根节点

codes/go/chapter_tree/avl_tree.go

@@ -6,7 +6,7 @@ package chapter_tree
 
 import . "github.com/krahets/hello-algo/pkg"
 
-/* AVL Tree*/
+/* AVL 树 */
 type avlTree struct {
 	// 根节点
 	root *TreeNode

codes/java/chapter_tree/avl_tree.java

@@ -8,7 +8,7 @@ package chapter_tree;
 
 import include.*;
 
-// Tree class
+/* AVL 树 */
 class AVLTree {
     TreeNode root; // 根节点
 

codes/swift/chapter_tree/avl_tree.swift

@@ -6,7 +6,7 @@
 
 import utils
 
-// Tree class
+/* AVL 树 */
 class AVLTree {
     fileprivate var root: TreeNode? // 根节点
 

codes/zig/chapter_tree/avl_tree.zig

@@ -5,7 +5,7 @@
 const std = @import("std");
 const inc = @import("include");
 
-// 平衡二叉树
+// AVL 树
 pub fn AVLTree(comptime T: type) type {
     return struct {
         const Self = @This();