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Editing previous lines while in here-document mode (<<EOF)

From: Garreau\, Alexandre
Subject: Editing previous lines while in here-document mode (<<EOF)
Date: Mon, 21 May 2018 10:40:24 +0200
User-agent: Gnus (5.13), GNU Emacs 25.1.1 (x86_64-pc-linux-gnu)


Not only because this is often frustrating and impractical, but also
because this tends to cause inconsistency feeling, I think it would be
useful I if you could go in the previous lines (with the left key, or
C-p keystroke, or something alike) while writting several lines after a
here-document (<<EOF), if C-a and C-e referred to beginning and end of
line respectively instead of of the command, and if the presentation
(displaying or not PS2, etc.) could be consistant among cases where you
write your here-document command for the first time and cases where you
took it from the history (then most of times it will be all editable
until you did hit Return somewhere then you go back to prompt and can’t
modify previous lines).

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