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Merge pull request #2494 from Samsara1994/patch-2

Update linkedhashmap-source-code.md
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@ -258,7 +258,7 @@ public V get(Object key) {
```java
void afterNodeAccess(Node < K, V > e) { // move node to last
LinkedHashMap.Entry < K, V > last;
//如果accessOrder 且当前节点不链表尾节点
//如果accessOrder 且当前节点不链表尾节点
if (accessOrder && (last = tail) != e) {
//获取当前节点、以及前驱节点和后继节点