There is a problem with the doctesting framework that I don't have the time
to investigate. Can someone else take over? The problem appears in
geometry/polyhedron/backend_ppl.py: the last set of doctests in that file
are
sage: p = Polyhedron(vertices=[(0,0),(1,0),(0,1)], rays=[(1,1)],
lines=[])
....: backend='ppl', base_ring=ZZ)
sage: TestSuite(p).run(skip='_test_pickling')
The problem is that the first line is actually a complete statement: there
is a typo, and the right parenthesis should actually be a comma. So there
is a syntax error here which is not caught by our doctesting framework. So
there must be a bug somewhere. It might be a quick fix for someone who
knows the doctesting framework well. (The syntax error is actually caught
if you build Sage with Python 3 instead of Python 2, in case that gives you
any clues.)
I've opened https://trac.sagemath.org/ticket/26038 to track this.
--
John
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