Log Message:
Update ruby-highine to 1.6.11.

= Change Log

Below is a complete listing of changes for each revision of HighLine.

== 1.6.11

* Fixed a bad test.  (Fix by Diego Elio Pettenò.)

== 1.6.10

* Fixed a regression that prevented asking for String arguments (by Jeffery
  Sman.)
* Fixed a testing incompatibility (by Hans de Graaff.)

== 1.6.9

* The new list modes now properly ignore escapes when sizing.
* Added a project gemspec file.
* Fixed a bug that prevented the use of termios (by tomdz).
* Switch to JLine to provide better echo support on JRuby (by tomdz).