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bug#9970: 24.0.90; Commandify set-frame-{height,width}

From: Juri Linkov
Subject: bug#9970: 24.0.90; Commandify set-frame-{height,width}
Date: Wed, 21 Aug 2019 00:52:11 +0300
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (x86_64-pc-linux-gnu)

>> This is a feature request, not a bug report:
>> I suggest turning set-frame-width and set-frame-height into commands,
>> so that you can type, e.g., C-u 80 M-x set-frame-width RET in order to
>> set the width of the current frame to 80 characters. Without a prefix
>> character, the commands should prompt the user. (I see no reason to
>> allow the specification of a frame other than the current, or to
>> support the PRETEND arg, in interactive use.)
> Sounds like a useful addition, so I've now added this to Emacs 27.

Maybe better to use (prefix-numeric-value current-prefix-arg)
to allow e.g. C-u C-u M-x set-frame-height RET

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