hg: jdk/client: 8192979: jshell tool: Online help text for commands is confusing

[robert.field at oracle.com]

Changeset: e2065f7505eb
Author:    rfield
Date:      2017-12-05 11:04 -0800
URL:       http://hg.openjdk.java.net/jdk/client/rev/e2065f7505eb

8192979: jshell tool: Online help text for commands is confusing
Reviewed-by: jlahoda

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