Update Doc/howto/a-conceptual-overview-of-asyncio.rst

Co-authored-by: Peter Bierma <zintensitydev@gmail.com>

Author: anordin95

Doc/howto/a-conceptual-overview-of-asyncio.rst

@@ -418,7 +418,7 @@ will monitor how much time has elapsed and accordingly call
 We'll use a rather bare object ``YieldToEventLoop()`` to ``yield`` from its
 ``__await__`` in order to cede control to the event loop.
 This is effectively the same as calling ``asyncio.sleep(0)``, but this approach
-offers more clarity , not to mention it's somewhat cheating to use
+offers more clarity, not to mention it's somewhat cheating to use
 ``asyncio.sleep`` when showcasing how to implement it!
 
 The event loop, as usual, cycles through its queue of tasks, giving them control,