[Python-checkins] Correct grammar mistake in stdtypes.rst (GH-10481)

[Miss Islington (bot)]

https://github.com/python/cpython/commit/7610f4fe93cf6909b5ffa28dcc46e55426243395
commit: 7610f4fe93cf6909b5ffa28dcc46e55426243395
branch: master
author: Andrés Delfino <adelfino at gmail.com>
committer: Miss Islington (bot) <31488909+miss-islington at users.noreply.github.com>
date: 2018-11-12T09:24:00-08:00
summary:

Correct grammar mistake in stdtypes.rst (GH-10481)

files:
M Doc/library/stdtypes.rst

diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index 18cd0b06885a..3375f64d94d2 100644
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -4335,7 +4335,7 @@ pairs within braces, for example: ``{'jack': 4098, 'sjoerd': 4127}`` or ``{4098:
 
    .. versionchanged:: 3.7
       Dictionary order is guaranteed to be insertion order.  This behavior was
-      implementation detail of CPython from 3.6.
+      an implementation detail of CPython from 3.6.
 
    Dictionaries and dictionary views are reversible. ::