hg: jdk/sandbox: 8212662: Fix javadoc typo in java.lang.ref.Cleaner

[chris.hegarty at oracle.com]

Changeset: e5fab74748fb
Author:    lancea
Date:      2018-10-18 10:45 -0400
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/e5fab74748fb

8212662: Fix javadoc typo in java.lang.ref.Cleaner
Reviewed-by: lancea, rriggs
Contributed-by: Andrew Luo <andrewluotechnologies at outlook.com>

! src/java.base/share/classes/java/lang/ref/Cleaner.java