Fix typos in code comment and documentation

Doc/library/asyncio-sync.rst

@@ -52,7 +52,7 @@ Lock
    :meth:`acquire` is a coroutine and should be called with ``yield from``.
 
    Locks also support the context management protocol.  ``(yield from lock)``
-   should be used as context manager expression.
+   should be used as the context manager expression.
 
    This class is :ref:`not thread safe <asyncio-multithreading>`.
 

Doc/library/marshal.rst

@@ -40,7 +40,7 @@ this module.  The following types are supported: booleans, integers, floating
 point numbers, complex numbers, strings, bytes, bytearrays, tuples, lists, sets,
 frozensets, dictionaries, and code objects, where it should be understood that
 tuples, lists, sets, frozensets and dictionaries are only supported as long as
-the values contained therein are themselves supported.
+the values contained therein are themselves supported.  The
 singletons :const:`None`, :const:`Ellipsis` and :exc:`StopIteration` can also be
 marshalled and unmarshalled.
 For format *version* lower than 3, recursive lists, sets and dictionaries cannot

Doc/library/urllib.request.rst

@@ -59,7 +59,7 @@ The :mod:`urllib.request` module defines the following functions:
 
    The *cadefault* parameter is ignored.
 
-   This function always returns an object which can work as
+   This function always returns an object which can work as a
    :term:`context manager` and has methods such as
 
    * :meth:`~urllib.response.addinfourl.geturl` --- return the URL of the resource retrieved,

Lib/asyncio/locks.py

@@ -111,7 +111,7 @@ class Lock(_ContextManagerMixin):
     acquire() is a coroutine and should be called with 'yield from'.
 
     Locks also support the context management protocol.  '(yield from lock)'
-    should be used as context manager expression.
+    should be used as the context manager expression.
 
     Usage:
 

Misc/NEWS

@@ -7778,7 +7778,7 @@ Library
 - Issue #16176: Properly identify Windows 8 via platform.platform()
 
 - Issue #16088: BaseHTTPRequestHandler's send_error method includes a
-  Content-Length header in it's response now. Patch by Antoine Pitrou.
+  Content-Length header in its response now. Patch by Antoine Pitrou.
 
 - Issue #16114: The subprocess module no longer provides a misleading error
   message stating that args[0] did not exist when either the cwd or executable

Python/symtable.c

@@ -854,7 +854,7 @@ analyze_child_block(PySTEntryObject *entry, PyObject *bound, PyObject *free,
 
     /* Copy the bound and global dictionaries.
 
-       These dictionary are used by all blocks enclosed by the
+       These dictionaries are used by all blocks enclosed by the
        current block.  The analyze_block() call modifies these
        dictionaries.