Clarification on tag-prefix-cond vs. tag-prefix

To: "Mutt_Users_Mailing_List (null)" <mutt-users@xxxxxxxx>
Subject: Clarification on tag-prefix-cond vs. tag-prefix
From: "John J. Foster" <Mutt-Users@xxxxxxxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 12 Feb 2009 20:15:53 -0700
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Am I nuts, or are these functionally equivalent?

Thanks,
festus
-- 
I just want to break even.
                Richard Manuel

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Follow-Ups:
- Re: Clarification on tag-prefix-cond vs. tag-prefix
  - From: Kyle Wheeler