ListChangesOption: Add missing word in Javadoc

Change-Id: Ie16f10bc6007baa13e55f655981a605c1d666fd1

gerrit-extension-api/src/main/java/com/google/gerrit/extensions/client/ListChangesOption.java

diff --git a/gerrit-extension-api/src/main/java/com/google/gerrit/extensions/client/ListChangesOption.java b/gerrit-extension-api/src/main/java/com/google/gerrit/extensions/client/ListChangesOption.java
index ee7d039..f04685f 100644
--- a/gerrit-extension-api/src/main/java/com/google/gerrit/extensions/client/ListChangesOption.java
+++ b/gerrit-extension-api/src/main/java/com/google/gerrit/extensions/client/ListChangesOption.java
@@ -17,7 +17,7 @@
 import java.util.EnumSet;
 import java.util.Set;
 
-/** Output options available for retrieval change details. */
+/** Output options available for retrieval of change details. */
 public enum ListChangesOption {
   LABELS(0),
   DETAILED_LABELS(8),