hg: jdk7/tl/jdk: 7038501: Clarify meaning of "(optional)" in javadoc

[chris.hegarty at oracle.com]

Changeset: 7fd31e477313
Author:    dl
Date:      2011-04-21 13:53 +0100
URL:       http://hg.openjdk.java.net/jdk7/tl/jdk/rev/7fd31e477313

7038501: Clarify meaning of "(optional)" in javadoc
Reviewed-by: chegar

! src/share/classes/java/util/concurrent/BlockingDeque.java
! src/share/classes/java/util/concurrent/BlockingQueue.java
! src/share/classes/java/util/concurrent/ConcurrentMap.java
! src/share/classes/java/util/concurrent/CopyOnWriteArrayList.java