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From: Michael Cook <cook@sightpath.com>
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Subject: %f of gnus-summary-line-format
Date: 15 Jan 1999 11:13:35 -0500
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I'm trying to get %f of gnus-summary-line-format working.
The help text says:

  %f   Contents of the From: or To: headers (string)

So, in my gnus-summary-line-format, I changed the %-20,20n to
%-20,20f.  But that change had no apparent effect in the
subsequently-generated *Summary* buffers.

Poking around in gnus-sum.el, I found the function
gnus-summary-from-or-to-or-newsgroups.  This function uses the
expression `(mail-header-extra header)' repeatedly.  But that
expression always seems to evaluate to nil.  And so
gnus-summary-from-or-to-or-newsgroups just always seems to return
the usual `mail-header-from' value.

Am I misunderstanding how %f is supposed to work?
Or is there a bug here somewhere.

(I'm using nnml groups, pgnus-0.69, and EMACS 20.3.1.)

M.