Re: Bug tracker breaks rmail-next-same-subject

[Eli Zaretskii <eliz@gnu.org>]

> From: Stefan Monnier <monnier@IRO.UMontreal.CA>
> Cc: don@armstrong.com, owner@emacsbugs.donarmstrong.com, emacs-devel@gnu.org
> Date: Fri, 12 Dec 2008 14:10:40 -0500
> 
> > The bug tracker modifies the Subject lines, which breaks
> > `rmail-next-same-subject' and `rmail-previous-same-subject'.
> 
> > I understand why it tries to do that, but perhaps we can find a better
> > way of signalling important status changes without breaking Rmail?
> 
> Could you show some examples, to make sure we talk about the same kinds
> of changes?

A bug report starts with a Subject such as this:

  Subject: bug#NNNN: 23.0.60; FOO

then it can be modified into this:

  Subject: Processed: Re: bug#NNNN: 23.0.60; FOO

or this:

  Subject: bug#NNN: marked as done (23.0.60; FOO)

or this:

  Subject: bug#NNNN: Info received (bug#NNNN: 23.0.60; FOO)

I'm not sure this is an exhaustive list of all the transformations,
it's just what I found in my INBOX this morning, but Don can
undoubtedly provide more examples, if they exist.

By contrast, rmail-current-subject-regexp allows only for typical
reply prefixes, such as "Re:", and arbitrary whitespace changes, such
as adding or removing newlines.