Re: Add function eshell/clear to clear current eshell buffer

[Eli Zaretskii <eliz@gnu.org>]

> From: Ted Zlatanov <tzz@lifelogs.com>
> Date: Sat, 18 Apr 2015 07:12:22 -0400
> 
> >> > +(defun eshell/clear ()
> >> > +  "Clear the eshell-buffer"
> >> 
> >> Now this command does not clear the eshell buffer any more, but the
> >> eshell window.  I think the doc string should say so because this has
> >> security implications: The user may think some info is gone but actually
> >> it’s only no longer visible.
> 
> EZ> The same happens with a few terminal emulators, so users should
> EZ> already be expecting that possibility
> 
> But eshell is not a terminal emulator.  It's a shell.  Emacs provides
> the text UI around it.

I don't see the significance of this observation for the issue at
hand.  Eshell is an implementation of a shell in Emacs Lisp, and as
such, Emacs is part of it.  Therefore, we should compare what Eshell's
command do with what shells+emulators do.

> I would rename `eshell/clear' to `eshell/clear-view' and also provide
> `eshell/clear-buffer', if that's OK with Vibhav and everyone else?

Eshell should have commands named like corresponding shell commands.
Having commands with no namesakes in popular shells makes very little
sense to me.