Upgrade to pynac-0.7.5

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Pynac-0.7.5 has

• crucial improvements to Gosper algorithm (Gosper algorithm and Wilf-Zeilberger certificate #22090)
• pynac.pc additions

https://github.com/pynac/pynac/releases/download/pynac-0.7.5/pynac-0.7.5.tar.bz2

Depends on #22421

Component: packages: standard

Author: Ralf Stephan

Branch: 8d7801e

Reviewer: Volker Braun

Issue created by migration from https://trac.sagemath.org/ticket/22364

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Branch: u/rws/upgrade_to_pynac_0_7_5

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Changed branch from u/rws/upgrade_to_pynac_0_7_5 to none

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Description changed:

--- 
+++ 
@@ -1,5 +1,5 @@
 Pynac-0.7.5 has
-- crucial improvements to Gosper algorithm
+- crucial improvements to Gosper algorithm (#22090)
 - pynac.pc additions
 
 https://github.com/pynac/pynac/releases/download/pynac-0.7.5/pynac-0.7.5.tar.bz2

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Author: Ralf Stephan

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Commit: 46697e0

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New commits:

46697e0

pkg version/chksum

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Branch: u/rws/upgrade_to_pynac_0_7_5

[vbraun]

Reviewer: Volker Braun