Upgrade to pynac-0.6.8

[rwst]

The new Pynac version does:

• fix polylog evalf (Sage Doctests for: fix polylog evalf #18386)
• better beta_evalf() (Sage Use mpmath for numerical evaluation of the beta function #15196)
• fix bug in cancelling of fractions (Sage normalization in Pynac buggy #19775, Fraction not cancelled by Expression.normalize() #20843)
• fix some positive/nonnegative bugs
• do not ignore _print_latex_() in GinacFunctions (Support GinacFunction._print_latex_() customization #20888)
• provide Pynac version of Maxima's ex.coefficients()
• provide Pynac version of Maxima's ex.combine()
• some fixes ported from GiNaC

https://github.com/pynac/pynac/releases/download/pynac-0.6.8/pynac-0.6.8.tar.bz2

CC: @paulmasson

Component: packages: standard

Author: Ralf Stephan

Branch/Commit: 0eb21db

Reviewer: Paul Masson

Issue created by migration from https://trac.sagemath.org/ticket/21034

[rwst]

Branch: u/rws/upgrade_to_pynac_0_6_8

[rwst]

Description changed:

--- 
+++ 
@@ -5,6 +5,7 @@
 * fix some positive/nonnegative bugs
 * do not ignore `_print_latex_()` in `GinacFunction`s
 * provide Pynac version of Maxima's `ex.coefficients()` (Sage #20455)
+* provide Pynac version of Maxima's `ex.combine()`
 * some fixes ported from GiNaC
 
 https://github.com/pynac/pynac/releases/download/pynac-0.6.8/pynac-0.6.8.tar.bz2

[rwst]

New commits:

7fd4370	pkg version / checksum
2f43ed9	use Pynac instead of Maxima in ex.coefficients() and combine()
3784da9	doc and doctest changes

[rwst]

Author: Ralf Stephan

[rwst]

Commit: 3784da9

[paulmasson]

comment:3

Started from a clean copy of 7.3.beta8 develop and pulled in changes for this ticket. Ran make and got this error:

The following package(s) may have failed to build (not necessarily
during this run of 'make all'):

* package: sagelib-7.3.beta5
  log file: /Users/Masson/Downloads/GitHub/sage/logs/pkgs/sagelib-7.3.beta5.log
  build directory: /Users/Masson/Downloads/GitHub/sage/local/var/tmp/sage/build/sagelib-7.3.beta5

Ran make again on develop with no problem.

[paulmasson]

Reviewer: Paul Masson

[rwst]

Description changed:

--- 
+++ 
@@ -3,7 +3,7 @@
 * better beta_evalf() (Sage #15196)
 * fix bug in cancelling of fractions (Sage #19775, #20843)
 * fix some positive/nonnegative bugs
-* do not ignore `_print_latex_()` in `GinacFunction`s
+* do not ignore `_print_latex_()` in `GinacFunction`s (#20888)
 * provide Pynac version of Maxima's `ex.coefficients()` (Sage #20455)
 * provide Pynac version of Maxima's `ex.combine()`
 * some fixes ported from GiNaC

[paulmasson]

comment:6

Any update on the 7.3.beta5 error message? Something on my end or yours?

[rwst]

comment:7

Replying to @paulmasson:

Started from a clean copy of 7.3.beta8 develop and pulled in changes for this ticket.

How did you "pull in" the changes? BTW, if you do git trac checkout 21034 you will always get the Sage version of the branch in 21034, regardless of your develop. Also a hint: make start will skip building the expensive step of building the docs.

You should also download the pynac tarball and copy it into upstream/ before making.