From d3865574a93b6cb6c712829c51af5b6f9d4e9e76 Mon Sep 17 00:00:00 2001
From: Sebastian Rittau <srittau@rittau.org>
Date: Mon, 2 Jul 2018 23:34:18 +0200
Subject: [PATCH] Remove asyncio.tasks.async (#2296)

While this alias for ensure_future existed prior to Python 3.7, it
causes a syntax error when parsing it with Python 3.7 or above.
---
 stdlib/3.4/asyncio/__init__.pyi | 1 -
 stdlib/3.4/asyncio/tasks.pyi    | 3 ++-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/stdlib/3.4/asyncio/__init__.pyi b/stdlib/3.4/asyncio/__init__.pyi
index ebd0bb289..6650910ea 100644
--- a/stdlib/3.4/asyncio/__init__.pyi
+++ b/stdlib/3.4/asyncio/__init__.pyi
@@ -46,7 +46,6 @@ from asyncio.tasks import (
     ALL_COMPLETED as ALL_COMPLETED,
     as_completed as as_completed,
     ensure_future as ensure_future,
-    async as async,
     gather as gather,
     run_coroutine_threadsafe as run_coroutine_threadsafe,
     shield as shield,
diff --git a/stdlib/3.4/asyncio/tasks.pyi b/stdlib/3.4/asyncio/tasks.pyi
index 12bba7e80..15f5e2dbe 100644
--- a/stdlib/3.4/asyncio/tasks.pyi
+++ b/stdlib/3.4/asyncio/tasks.pyi
@@ -24,7 +24,8 @@ def as_completed(fs: Sequence[_FutureT[_T]], *, loop: AbstractEventLoop = ...,
                  timeout: Optional[float] = ...) -> Iterator[Generator[Any, None, _T]]: ...
 def ensure_future(coro_or_future: _FutureT[_T],
                   *, loop: AbstractEventLoop = ...) -> Future[_T]: ...
-async = ensure_future
+# Prior to Python 3.7 'async' was an alias for 'ensure_future'.
+# It became a keyword in 3.7.
 @overload
 def gather(coro_or_future1: _FutureT[_T1],
            *, loop: AbstractEventLoop = ..., return_exceptions: bool = ...) -> Future[Tuple[_T1]]: ...