hg: lambda/lambda/jdk: Bug fix and clarify javadoc for null-friendly comparator

[henry.jen at oracle.com]

Changeset: 197698000f78
Author:    henryjen
Date:      2013-06-20 15:58 -0700
URL:       http://hg.openjdk.java.net/lambda/lambda/jdk/rev/197698000f78

Bug fix and clarify javadoc for null-friendly comparator

! src/share/classes/java/util/Comparator.java
! src/share/classes/java/util/Comparators.java
! test/java/util/Comparator/BasicTest.java