hg: jdk10/jdk10/langtools: 8177847: jshell tool: retain delete of non-retained mode does not locally delete

[robert.field at oracle.com]

Changeset: e9b5b77ad698
Author:    rfield
Date:      2017-06-26 18:43 -0700
URL:       http://hg.openjdk.java.net/jdk10/jdk10/langtools/rev/e9b5b77ad698

8177847: jshell tool: retain delete of non-retained mode does not locally delete
Reviewed-by: jlahoda

! src/jdk.jshell/share/classes/jdk/internal/jshell/tool/Feedback.java
! test/jdk/jshell/ToolCommandOptionTest.java