hg: jdk9/dev/langtools: 8146138: jshell tool: add /help <command>; ...

[robert.field at oracle.com]

Changeset: dd05d3761a34
Author:    rfield
Date:      2016-02-12 10:51 -0800
URL:       http://hg.openjdk.java.net/jdk9/dev/langtools/rev/dd05d3761a34

8146138: jshell tool: add /help <command>
8147495: jshell tool: correctly handle arguments on /seteditor command
8147886: jshell tool: commands don't allow reference to start-up or explicit id of dropped/failed snippets
8147887: jshell tool: /list start -- fails
8147898: jshell tool: /reload quiet -- should quiet echo
Reviewed-by: jlahoda

! src/jdk.jshell/share/classes/jdk/internal/jshell/tool/ExternalEditor.java
! src/jdk.jshell/share/classes/jdk/internal/jshell/tool/JShellTool.java
! test/jdk/jshell/ToolBasicTest.java
! test/jdk/jshell/ToolReloadTest.java