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'mod' and 'div' need brackets ro read as atoms

From: Jasper Taylor
Subject: 'mod' and 'div' need brackets ro read as atoms
Date: Thu, 04 Aug 2011 17:50:02 +0100
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20110617 Thunderbird/3.1.11

| ?- P = div.
uncaught exception: error(syntax_error('user_input:1 (char:5) current or previous operator needs brackets'),read_term/3)

This is a problem because I cannot read terms written by pre-1.4 versions of GNU prolog (or other prologs) including these atoms. Also there does not seem to be any reason for it -- other 2-ary arithmetic operators like atan2 can be read directly so why not these?

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