MINOR: fix comment in TimingWheel
Reviewers: Luke Chen Jun Rao
@@ -78,7 +78,7 @@ import java.util.concurrent.atomic.AtomicInteger
*
* 1 [c+2,c+2] [c+3,c+3] [c+4,c+4]
* 2 [c,c+2] [c+3,c+5] [c+6,c+8]
- * 3 [c,c+8] [c+9,c+17] [c+18,c+18]
+ * 3 [c,c+8] [c+9,c+17] [c+18,c+26]
*
* At time = c+3, [c+2,c+2] is newly expired.
* Level 2 moves to c+3, and [c+5,c+5] and [c+9,c+11] are created.
@@ -86,7 +86,7 @@ import java.util.concurrent.atomic.AtomicInteger
*
* 1 [c+3,c+3] [c+4,c+4] [c+5,c+5]
* 2 [c+3,c+5] [c+6,c+8] [c+9,c+11]
- * 3 [c,c+8] [c+9,c+17] [c+8,c+11]
+ * 3 [c,c+8] [c+9,c+17] [c+18,c+26]
*
* The hierarchical timing wheels works especially well when operations are completed before they time out.
* Even when everything times out, it still has advantageous when there are many items in the timer.
