hg: jdk/sandbox: 8223178: Improve FileSystems.newFileSystem example with map factory methods

[chris.hegarty at oracle.com]

Changeset: 029b56549e22
Author:    darcy
Date:      2019-05-03 14:09 -0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/029b56549e22

8223178: Improve FileSystems.newFileSystem example with map factory methods
Reviewed-by: alanb, clanger, bpb

! src/java.base/share/classes/java/nio/file/FileSystems.java