ted (Tiny EDitor) is a lightweight commandline text editor designed for
scripting. It's intended to be an easier-to-use alternative to "ed". It
is lightweight, scriptable, and easily harnessed by shell scripts, but
doesn't suffer from the chronic user-unfriendliness that characterizes
ed. It is also slightly more featureful than ed, and includes multiple
editing buffers and built-in script handling.
