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-- hruletohr
-- \hrule primitive is impossible to redefine catching all possible arguments
-- with tex4ht, it is converted as series of underscores
-- it seems that these underscores are always part of previous paragraph
-- this assumption may be wrong, needs more real world testing
local hruletohr = function(s)
return s:gsub("___+(.-)</p>","%1</p>\n<hr class=\"hrule\" />")
end
return hruletohr
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