Various formatting & grammar fixes in asyncio* docs.

Doc/library/asyncio-dev.rst

@@ -44,7 +44,7 @@ the event loop.
 
 .. _asyncio-handle-blocking:
 
-Handle correctly blocking functions
+Handle blocking functions correctly
 -----------------------------------
 
 Blocking functions should not be called directly. For example, if a function

Doc/library/asyncio-eventloop.rst

@@ -8,15 +8,15 @@ Event loops
 The event loop is the central execution device provided by :mod:`asyncio`.
 It provides multiple facilities, amongst which:
 
-* Registering, executing and cancelling delayed calls (timeouts)
+* Registering, executing and cancelling delayed calls (timeouts).
 
 * Creating client and server :ref:`transports <asyncio-transport>` for various
-  kinds of communication
+  kinds of communication.
 
 * Launching subprocesses and the associated :ref:`transports <asyncio-transport>`
-  for communication with an external program
+  for communication with an external program.
 
-* Delegating costly function calls to a pool of threads
+* Delegating costly function calls to a pool of threads.
 
 Event loop functions
 --------------------

Doc/library/asyncio.rst

@@ -30,7 +30,7 @@ Here is a more detailed list of the package contents:
 * coroutines and tasks based on ``yield from`` (:PEP:`380`), to help write
   concurrent code in a sequential fashion;
 
-* cancellation support for Futures and coroutines;
+* cancellation support for :class:`Future`\s and coroutines;
 
 * :ref:`synchronization primitives <asyncio-sync>` for use between coroutines in
   a single thread, mimicking those in the :mod:`threading` module;