From 9d63d29f508ad4a86088344f041645632c64b638 Mon Sep 17 00:00:00 2001
From: Yishuai Li
Date: Wed, 27 May 2020 14:14:33 -0400
Subject: [stdlib] Decidable instance for negation

Added Changelog
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 doc/changelog/10-standard-library/12420-decidable.rst | 4 ++++
 1 file changed, 4 insertions(+)
 create mode 100644 doc/changelog/10-standard-library/12420-decidable.rst

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+- **Added:**
+  ``Decidable`` instance for negation
+  (`#12420 <https://github.com/coq/coq/pull/12420>`_,
+  by Yishuai Li).
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