hg: jdk/jdk12: 8215099: jshell tool: /help representation of ctrl/meta characters inconsistent

[robert.field at oracle.com]

Changeset: 83840e83476a
Author:    rfield
Date:      2018-12-15 17:13 -0800
URL:       http://hg.openjdk.java.net/jdk/jdk12/rev/83840e83476a

8215099: jshell tool: /help representation of ctrl/meta characters inconsistent
Reviewed-by: jlahoda

! src/jdk.jshell/share/classes/jdk/internal/jshell/tool/resources/l10n.properties
! test/langtools/jdk/jshell/ToolShiftTabTest.java
! test/langtools/jdk/jshell/ToolSimpleTest.java