For the most part, it doesn't. Between NNTP not supporting updated articles, and perlmonks' support for updating nodes being poor, it just isn't worth it to support this until one of those things (most likely the later) gets better.
Warning: Unless otherwise stated, code is untested. Do not use without understanding. Code is posted in the hopes it is useful, but without warranty. All copyrights are relinquished into the public domain unless otherwise stated. I am not an angel. I am capable of error, and err on a fairly regular basis. If I made a mistake, please let me know (such as by replying to this node).
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