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bug#25665: 26.0.50; [PATCH] Indicate prefix arg in minibuffer prompt for

From: Tino Calancha
Subject: bug#25665: 26.0.50; [PATCH] Indicate prefix arg in minibuffer prompt for shell-command
Date: Fri, 10 Feb 2017 12:05:29 +0900 (JST)
User-agent: Alpine 2.20 (DEB 67 2015-01-07)

On Thu, 9 Feb 2017, address@hidden wrote:

On Thu, Feb 9, 2017 at 11:53 AM, Tino Calancha <address@hidden> wrote:

The meaning of the prefix argument must be explained in the docstring.
That and the manual are the source of documentation, not the prompt.

But it's nice if Emacs gives you a different prompt, so that you can be
sure you typed in the command correctly.
Confirmation for having typed C-u?
Well, sometimes some keys in old keyboards die... ;-)

Just like M-& gives a
different prompt from M-!, even though you could figure out the
different meaning just by reading the docstring of each command.
These are different commands so its Emacs (and whatever editor)
convention to how a different prompt.  The OP suggests to use
a different prompt for the same command w/ or w/o prefix.

There are lots of commands in Emacs accepting a raw,
numeric prefix etc.  If we change M-! prompt, we might
also want to tune the prompt for all of them.  Do we want that?

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