Dired E command

[Leigh L. Klotz <KLOTZ @ MIT-MC>]

    Date: Tue, 9 Oct 1984  20:12 EDT
    From: AGRE at MIT-OZ
    To:   bug-dired at MIT-OZ
    Re:   Dired E command
    ReSent-Date: Wed 10 Oct 84 06:12:41-EDT
    ReSent-From: Gail Zacharias <GZ%MIT-OZ@MIT-MC.ARPA>
    ReSent-To: bug-emacs@MIT-MC

    I dearly wish that some public-spirited person would give Dired
    a version of the E command with the LispM's Dired E semantics.
    Such a command would edit the current file not in a recursive
    ^R but rather in another full-fledged buffer, as if you had 
    called up the file with ^X^F yourself.

    /phil

CCA EMACS does this by having a Dired Mode (a Major Mode) for buffers.
With ITS EMACS it's hard because Dired is a Subsystem, which takes over
completely, and runs inside a recursive ^R loop.  It would take just a
little bit of hacking to make this happen.  I'm not sure about the overhead
for all the local variables, though.  I don't know if that was the reason
it was done as by hand instead of as a major mode.

What about Info and Babyl and so on?