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From: Richard Stallman <rms@gnu.org>
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Subject: Re: M-<function-key> vs. ESC <function-key>
Date: Tue, 04 Jan 2005 22:31:29 -0500
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    >     There doesn't seem to be a translation between M-<function-key> and ESC
    >     <function-key> for the purpose of keymap lookup.
    >
    > That is true, but I don't think it is a problem.

    IMHO it is.  Currently you need to bind both M-<func> and ESC <func> to be
    effective for both tty and X (including keyboards without a Meta
    modifier).

Emacs doesn't treat ESC followed by a function key as equivalent to
Meta, so I don't think you need to bind the former at all.

I agree, as I said, that it would be better if Meta worked more
like Control- and so on.  I just don't think it is urgent.