nnrss-ignore-article-fields for more than just fields

[jidanni@jidanni.org]

> In No Gnus, there's `nnrss-ignore-article-fields' to deal with
> duplicated articles.

nnrss-ignore-article-fields is a variable defined in `nnrss.el'.
Its value is (slash:comments)

Is that something to do with Slashdot? Perhaps its a
Slash:Comments: 44 field?

Anyway, here's the difference between two articles I wish nnrss would
consider the same
8c8
< Message-ID: <496@TorrentFreak.nnrss>
---
> Message-ID: <512@TorrentFreak.nnrss>
72,75c72
< href="http://torrentfreak.com">Torre
< href="http://feedads.googleadservice
< src="http://feedads.googleadservices
< border="0" ismap="true"></img></a></
---
> href="http://torrentfreak.com">Torre
94c91
< <p><a href="http://feedads.googleads
---
> 


Here's another pair:
4c4
< Date: Tue, 06 May 2008 09:6:46 EST
---
> Date: Sat, 10 May 2008 10:10:56 EST
7c7
< Message-ID: <13@LiveScience.com_Envi
---
> Message-ID: <17@LiveScience.com_Envi
11,14c11,12
< How we treat Earth involves trillion
< of individuals.<img
< src="http://feeds.livescience.com/~r
< height="1" width="1"/>
---
> How we treat Earth involves trillion
> src="http://feeds.livescience.com/~r

I.e., I need not be informed of a slight rewrite of their article, in
_some_ groups only, not all. So what should I set
nnrss-ignore-article-fields to?