YARN-6328. Fix a spelling mistake in CapacityScheduler. Contributed by Jin Yibo. This closes #202

(cherry picked from commit 2d0e24eb01cec6f4554671b54729717510711c63)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/CapacityScheduler.java

@@ -2217,7 +2217,7 @@ public class CapacityScheduler extends
 
         // Get the default priority for the Queue. If Queue is non-existent,
         // then
-        // use default priority. Do it only if user doesnt have any default.
+        // use default priority. Do it only if user doesn't have any default.
         if (null == appPriority) {
           appPriority = this.queueManager.getDefaultPriorityForQueue(queueName);
         }