hg: jdk10/jdk10/jdk: 8186713: Document default rounding mode in NumberFormat

[nishit.jain at oracle.com]

Changeset: 73f03af58164
Author:    nishjain
Date:      2017-08-29 12:16 +0530
URL:       http://hg.openjdk.java.net/jdk10/jdk10/jdk/rev/73f03af58164

8186713: Document default rounding mode in NumberFormat
Reviewed-by: naoto, bpb
Contributed-by: nishit.jain at oracle.com

! src/java.base/share/classes/java/text/NumberFormat.java
! src/java.base/share/classes/java/util/Formatter.java