Fix a typo in asyncio-dev.rst. (GH-10133)

benjaminp · web-flow · commit 4e3a53bceefe · 2018-10-26T10:14:04.000-07:00
"threadsafe"
diff --git a/Doc/library/asyncio-dev.rst b/Doc/library/asyncio-dev.rst
@@ -50,7 +50,7 @@ When the debug mode is enabled:
   <asyncio-coroutine-not-scheduled>` and logs them; this mitigates
   the "forgotten await" pitfall.
 
-* Many non-treadsafe asyncio APIs (such as :meth:`loop.call_soon` and
+* Many non-threadsafe asyncio APIs (such as :meth:`loop.call_soon` and
   :meth:`loop.call_at` methods) raise an exception if they are called
   from a wrong thread.
 
