hg: jdk/sandbox: 3 new changesets

[chris.hegarty at oracle.com]

Changeset: 9759972b4f1c
Author:    darcy
Date:      2019-10-03 08:49 -0700
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/9759972b4f1c

8231777: Remove extraneous @serial javadoc tag in NodeChangeEvent.java
Reviewed-by: alanb, chegar

! src/java.prefs/share/classes/java/util/prefs/NodeChangeEvent.java

Changeset: 7a4183b8062f
Author:    lmesnik
Date:      2019-10-03 08:50 -0700
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/7a4183b8062f

8231768: Remove duplicate if/else in vmTestbase/nsk/share/jdi/Binder.java
Reviewed-by: sspitsyn, phh, cjplummer

! test/hotspot/jtreg/vmTestbase/nsk/share/jdi/Binder.java

Changeset: 3ab9f0464a7d
Author:    lmesnik
Date:      2019-10-03 08:51 -0700
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/3ab9f0464a7d

Merge