hg: jdk/sandbox: 8214687: Optimize Collections.nCopies().hashCode() and equals()

[chris.hegarty at oracle.com]

Changeset: cfceb4df2499
Author:    tvaleev
Date:      2018-12-30 08:57 +0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/cfceb4df2499

8214687: Optimize Collections.nCopies().hashCode() and equals()
Reviewed-by: igerasim, smarks

! src/java.base/share/classes/java/util/Collections.java
! test/jdk/java/util/Collections/NCopies.java