%c Number of characters in the article (integer)
%L Number of lines in the article (integer)
%I Indentation based on thread level (a string of spaces)
+%B A complex trn-style thread tree (string)
%T A string with two possible values: 80 spaces if the article
is on thread level two or larger and 0 spaces on level one
%R \"A\" if this article has been replied to, \" \" otherwise (character)