[Python-checkins] Docs: Mention that Py_UNREACHABLE was added in 3.7 (#4337)

[Serhiy Storchaka]

https://github.com/python/cpython/commit/8bf288e2c5330148e4bd07d9c2f1ccd05ced5a86
commit: 8bf288e2c5330148e4bd07d9c2f1ccd05ced5a86
branch: master
author: Petr Viktorin <encukou at gmail.com>
committer: Serhiy Storchaka <storchaka at gmail.com>
date: 2017-11-08T15:11:16+02:00
summary:

Docs: Mention that Py_UNREACHABLE was added in 3.7 (#4337)

The macro was added for bpo-31338 in commit b2e5794870eb4728ddfaafc0f79a40299576434f

files:
M Doc/c-api/intro.rst

diff --git a/Doc/c-api/intro.rst b/Doc/c-api/intro.rst
index e654c4c0126..de7139bc17f 100644
--- a/Doc/c-api/intro.rst
+++ b/Doc/c-api/intro.rst
@@ -106,6 +106,8 @@ complete listing.
    all possible values are covered in ``case`` statements.  Use this in places
    where you might be tempted to put an ``assert(0)`` or ``abort()`` call.
 
+   .. versionadded:: 3.7
+
 .. c:macro:: Py_ABS(x)
 
    Return the absolute value of ``x``.