[Python-checkins] Fix grammar in asyncio-dev.rst (GH-15672)

[Miss Islington (bot)]

https://github.com/python/cpython/commit/6b8121a261917256198ac5bc3a02306a05cea169
commit: 6b8121a261917256198ac5bc3a02306a05cea169
branch: 3.7
author: Miss Islington (bot) <31488909+miss-islington at users.noreply.github.com>
committer: GitHub <noreply at github.com>
date: 2019-09-03T23:13:24-07:00
summary:

Fix grammar in asyncio-dev.rst (GH-15672)


Automerge-Triggered-By: @ned-deily
(cherry picked from commit 675d17cec49ed7f7eb01d1bc3ae6999c728e070d)

Co-authored-by: Roger Iyengar <ri at rogeriyengar.com>

files:
M Doc/library/asyncio-dev.rst

diff --git a/Doc/library/asyncio-dev.rst b/Doc/library/asyncio-dev.rst
index b72880361929..101e7817a95e 100644
--- a/Doc/library/asyncio-dev.rst
+++ b/Doc/library/asyncio-dev.rst
@@ -119,7 +119,7 @@ all concurrent asyncio Tasks and IO operations would be delayed
 by 1 second.
 
 An executor can be used to run a task in a different thread or even in
-a different process to avoid blocking block the OS thread with the
+a different process to avoid blocking the OS thread with the
 event loop.  See the :meth:`loop.run_in_executor` method for more
 details.