[GiNaC-devel] Bug fix multiple polylogarithms

[Stefan Weinzierl]

Dear all,

the attached patch fixes the problem reported in
<http://www.cebix.net/pipermail/ginac-list/2016-August/002085.html>

This concerns the function Li_projection, which no longer uses for 
arguments x near +/- I the direct summation (which practically does not 
converge), but uses the Bernoulli transformation instead.

  Best regards,

    Stefan
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