This package provides a set of modules that form an interactive input
buffer written in plain perl with minimal dependencies. It features almost
all key-bindings described in the posix spec for the sh(1) utility with
some extensions like multiline editing; this includes a vi-command mode
with a save-buffer (for copy-pasting) and an undo-stack.

Historically this code was part of the Zoidberg shell, but this
implementation is complete independent from zoid and uses the
Term::ReadLine interface, so it can be used with other perl
programs.

( The documentation sometimes refers to 'the application', this is the
program using the ReadLine module for input. )