ZOOKEEPER-3250: typo in doc - zookeeperInternals

"has long as" -> "as long as"

Author: lwjli <liwenjie.thu07@gmail.com>

Reviewers: andor@apache.org

Closes #782 from lwjli/ZOOKEEPER-3250

zookeeper-docs/src/main/resources/markdown/zookeeperInternals.md

@@ -157,7 +157,7 @@ Leader activation includes leader election. We currently have two leader electio
 algorithms in ZooKeeper: LeaderElection and FastLeaderElection (AuthFastLeaderElection
 is a variant of FastLeaderElection that uses UDP and allows servers to perform a simple
 form of authentication to avoid IP spoofing). ZooKeeper messaging doesn't care about the
-exact method of electing a leader has long as the following holds:
+exact method of electing a leader as long as the following holds:
 
 * The leader has seen the highest zxid of all the followers.
 * A quorum of servers have committed to following the leader.