hg: jdk9/dev/langtools: 8177079: jshell tool: usability of /help for commands and sub-commands

[robert.field at oracle.com]

Changeset: 573dfe4c63d4
Author:    rfield
Date:      2017-03-29 16:07 -0700
URL:       http://hg.openjdk.java.net/jdk9/dev/langtools/rev/573dfe4c63d4

8177079: jshell tool: usability of /help for commands and sub-commands
Reviewed-by: jlahoda

! src/jdk.jshell/share/classes/jdk/internal/jshell/tool/JShellTool.java
! test/jdk/jshell/CommandCompletionTest.java
! test/jdk/jshell/ToolSimpleTest.java