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Customize how xrefs are followed in help-mode?

From: Eric Abrahamsen
Subject: Customize how xrefs are followed in help-mode?
Date: Thu, 16 May 2019 12:18:58 -0700
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux)

It's always bothered me that following a function/variable definition
button from a *Help* buffer goes to the file in a separate window -- I
almost always want to re-use the *Help* window.

Essentially, help-mode.el:209 hard-codes the use of `pop-to-buffer', I'd
like to be able to use `pop-to-buffer-same-window'.

>From a user's standpoint, I guess what I'd prefer is to be able to give
a prefix arg to RET when following the button, but I don't see any way
of passing that arg down, plus there's no good equivalent for the mouse

Would people consider a customization option to control this?


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