GNU bug report logs - #26825
dired-do-compress should prompt with already determined action

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From: =?utf-8?B?56mN5Li55bC8?= Dan Jacobson <jidanni@HIDDEN>
To: bug-gnu-emacs <bug-gnu-emacs@HIDDEN>
Subject: dired-do-compress should prompt with already determined action
Date: Mon, 08 May 2017 03:44:25 +0800
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Z runs the command dired-do-compress

But it prompts
"Compress or uncompress local.osm.gz? (y or n)" y
Uncompressing /cf/updates/no_backup/local.osm.gz...done

Can't the test be done a little earlier, so we could get
"Uncompress local.osm.gz? (y or n)" y
Uncompressing /cf/updates/no_backup/local.osm.gz...done

I mean it checks at some point what it should do.
Can't it check before asking?
I suppose the only savings of not checking earlier is if the user
aborts, then no check is needed.

The mixed case prompt twin wording,
"Compress or uncompress [next 3 files]? (y or n)"
is only fully appropriate if there indeed is a mixed case involved.