Fix Javadoc typo

Change-Id: I3f169eaf649843e954762bb4ac8f72fa5f88a67a
Signed-off-by: Michael Keppler <Michael.Keppler@gmx.de>

org.eclipse.jgit/src/org/eclipse/jgit/revwalk/RevWalkUtils.java

@@ -130,7 +130,7 @@ public final class RevWalkUtils {
 
 	/**
 	 * Find the list of branches a given commit is reachable from when following
-	 * parent.s
+	 * parents.
 	 * <p>
 	 * Note that this method calls
 	 * {@link org.eclipse.jgit.revwalk.RevWalk#reset()} at the beginning.