Whilst I'm on the subject of low-hanging fruit...
This just requires a trivial call to delete-duplicates at the
appropriate place. To find the appropriate place was less than trivial,
so I reformatted $solve and added comments (apart from the addition of
the delete-duplicates call, there's no code _changes_ just
reformatting).
I've attached a patch for this: is it comittable? I can't see any way I
could have broken anything, and the testsuite runs happily.
Rupert
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