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To: ding@gnus.org
From: Eric Abrahamsen <eric@ericabrahamsen.net>
Subject: Re: message-beginning-of-line behaves a bit strange
Date: Wed, 26 Jan 2022 13:30:07 -0800
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Uwe Brauer <oub@mat.ucm.es> writes:

> Hi
>
> I want to write a simple function that inserts always a specific word at the beginning of the subject line, either
>
>     1. If I want to compose a message and the subject is empty
>
>     2. Or I reply to message and the subject is not empty.
>
> So if I try 
>
> (message-goto-subject) the cursor jumps 
>
>     1. either (for an empty subject)
>        Subject:
>                ^
>        so I could insert the word
>
>     2. If the subject is not empty then the cursor jumps to
>        Subject: stuff
>                      ^
>        So I have to call message-beginning-of-line and obtain
>        Subject: stuff

Try `message-beginning-of-header' instead. Alternately, fooling with the
value of (variable) `message-beginning-of-line' while calling (function)
`message-beginning-of-line'.