Fix typos and English grammar in documentation and code comment

Doc/whatsnew/2.0.rst

@@ -506,7 +506,7 @@ arguments and/or a dictionary of keyword arguments. In Python 1.5 and earlier,
 you'd use the :func:`apply` built-in function: ``apply(f, args, kw)`` calls the
 function :func:`f` with the argument tuple *args* and the keyword arguments in
 the dictionary *kw*.  :func:`apply`  is the same in 2.0, but thanks to a patch
-from Greg Ewing, ``f(*args, **kw)`` as a shorter and clearer way to achieve the
+from Greg Ewing, ``f(*args, **kw)`` is a shorter and clearer way to achieve the
 same effect.  This syntax is symmetrical with the syntax for defining
 functions::
 

Lib/test/test_coroutines.py

@@ -1423,7 +1423,7 @@ class CoroutineTest(unittest.TestCase):
 
         with warnings.catch_warnings():
             warnings.simplefilter("error")
-            # Test that __aiter__ that returns an asyncronous iterator
+            # Test that __aiter__ that returns an asynchronous iterator
             # directly does not throw any warnings.
             run_async(main())
         self.assertEqual(I, 111011)

Misc/NEWS

@@ -2215,8 +2215,8 @@ Library
   writer failed in BufferedRWPair.close().
 
 - Issue #23622: Unknown escapes in regular expressions that consist of ``'\'``
-  and ASCII letter now raise a deprecation warning and will be forbidden in
-  Python 3.6.
+  and an ASCII letter now raise a deprecation warning and will be forbidden
+  in Python 3.6.
 
 - Issue #23671: string.Template now allows specifying the "self" parameter as
   a keyword argument.  string.Formatter now allows specifying the "self" and