Issue #15984: Merge PyUnicode doc from 3.5

35 files changed, 64 insertions, 70 deletions

diff --git a/Doc/c-api/exceptions.rst b/Doc/c-api/exceptions.rst
index 57f36ac..226b619 100644
--- a/Doc/c-api/exceptions.rst
+++ b/Doc/c-api/exceptions.rst
@@ -285,7 +285,7 @@ an error value).
 .. c:function:: int PyErr_WarnEx(PyObject *category, const char *message, Py_ssize_t stack_level)
 
    Issue a warning message.  The *category* argument is a warning category (see
-   below) or *NULL*; the *message* argument is an UTF-8 encoded string.  *stack_level* is a
+   below) or *NULL*; the *message* argument is a UTF-8 encoded string.  *stack_level* is a
    positive number giving a number of stack frames; the warning will be issued from
    the  currently executing line of code in that stack frame.  A *stack_level* of 1
    is the function calling :c:func:`PyErr_WarnEx`, 2 is  the function above that,
@@ -617,7 +617,7 @@ The following functions are used to create and modify Unicode exceptions from C.
 .. c:function:: PyObject* PyUnicodeTranslateError_Create(const Py_UNICODE *object, Py_ssize_t length, Py_ssize_t start, Py_ssize_t end, const char *reason)
 
    Create a :class:`UnicodeTranslateError` object with the attributes *object*,
-   *length*, *start*, *end* and *reason*. *reason* is an UTF-8 encoded string.
+   *length*, *start*, *end* and *reason*. *reason* is a UTF-8 encoded string.
 
 .. c:function:: PyObject* PyUnicodeDecodeError_GetEncoding(PyObject *exc)
                 PyObject* PyUnicodeEncodeError_GetEncoding(PyObject *exc)
diff --git a/Doc/c-api/import.rst b/Doc/c-api/import.rst
index 15a9e25..86c1d7d 100644
--- a/Doc/c-api/import.rst
+++ b/Doc/c-api/import.rst
@@ -72,7 +72,7 @@ Importing Modules
 
 .. c:function:: PyObject* PyImport_ImportModuleLevel(const char *name, PyObject *globals, PyObject *locals, PyObject *fromlist, int level)
 
-   Similar to :c:func:`PyImport_ImportModuleLevelObject`, but the name is an
+   Similar to :c:func:`PyImport_ImportModuleLevelObject`, but the name is a
    UTF-8 encoded string instead of a Unicode object.
 
    .. versionchanged:: 3.3
diff --git a/Doc/c-api/method.rst b/Doc/c-api/method.rst
index acc81e4..7a2a84f 100644
--- a/Doc/c-api/method.rst
+++ b/Doc/c-api/method.rst
@@ -49,7 +49,7 @@ Method Objects
 .. index:: object: method
 
 Methods are bound function objects. Methods are always bound to an instance of
-an user-defined class. Unbound methods (methods bound to a class object) are
+a user-defined class. Unbound methods (methods bound to a class object) are
 no longer available.
 
 
diff --git a/Doc/c-api/module.rst b/Doc/c-api/module.rst
index ef778cc..97a6354 100644
--- a/Doc/c-api/module.rst
+++ b/Doc/c-api/module.rst
@@ -50,7 +50,7 @@ Module Objects
 
 .. c:function:: PyObject* PyModule_New(const char *name)
 
-   Similar to :c:func:`PyImport_NewObject`, but the name is an UTF-8 encoded
+   Similar to :c:func:`PyImport_NewObject`, but the name is a UTF-8 encoded
    string instead of a Unicode object.
 
 
diff --git a/Doc/c-api/unicode.rst b/Doc/c-api/unicode.rst
index 2eeadb5..1ed8140 100644
--- a/Doc/c-api/unicode.rst
+++ b/Doc/c-api/unicode.rst
@@ -423,7 +423,7 @@ APIs:
 
 .. c:function:: PyObject *PyUnicode_FromString(const char *u)
 
-   Create a Unicode object from an UTF-8 encoded null-terminated char buffer
+   Create a Unicode object from a UTF-8 encoded null-terminated char buffer
    *u*.
 
 
@@ -556,14 +556,13 @@ APIs:
 .. c:function:: PyObject* PyUnicode_FromEncodedObject(PyObject *obj, \
                                const char *encoding, const char *errors)
 
-   Coerce an encoded object *obj* to an Unicode object and return a reference with
-   incremented refcount.
+   Decode an encoded object *obj* to a Unicode object.
 
    :class:`bytes`, :class:`bytearray` and other
    :term:`bytes-like objects <bytes-like object>`
    are decoded according to the given *encoding* and using the error handling
    defined by *errors*. Both can be *NULL* to have the interface use the default
-   values (see the next section for details).
+   values (see :ref:`builtincodecs` for details).
 
    All other objects, including Unicode objects, cause a :exc:`TypeError` to be
    set.
@@ -745,8 +744,11 @@ Extension modules can continue using them, as they will not be removed in Python
 
 .. c:function:: PyObject* PyUnicode_FromObject(PyObject *obj)
 
-   Shortcut for ``PyUnicode_FromEncodedObject(obj, NULL, "strict")`` which is used
-   throughout the interpreter whenever coercion to Unicode is needed.
+   Copy an instance of a Unicode subtype to a new true Unicode object if
+   necessary. If *obj* is already a true Unicode object (not a subtype),
+   return the reference with incremented refcount.
+
+   Objects other than Unicode or its subtypes will cause a :exc:`TypeError`.
 
 
 Locale Encoding
@@ -1224,7 +1226,7 @@ These are the UTF-16 codec APIs:
 
    If *Py_UNICODE_WIDE* is defined, a single :c:type:`Py_UNICODE` value may get
    represented as a surrogate pair. If it is not defined, each :c:type:`Py_UNICODE`
-   values is interpreted as an UCS-2 character.
+   values is interpreted as a UCS-2 character.
 
    Return *NULL* if an exception was raised by the codec.
 
diff --git a/Doc/howto/urllib2.rst b/Doc/howto/urllib2.rst
index 7d5044b..0d04c9f 100644
--- a/Doc/howto/urllib2.rst
+++ b/Doc/howto/urllib2.rst
@@ -64,7 +64,7 @@ you can do so via the :func:`~urllib.request.urlretrieve` function::
     html = open(local_filename)
 
 Many uses of urllib will be that simple (note that instead of an 'http:' URL we
-could have used an URL starting with 'ftp:', 'file:', etc.).  However, it's the
+could have used a URL starting with 'ftp:', 'file:', etc.).  However, it's the
 purpose of this tutorial to explain the more complicated cases, concentrating on
 HTTP.
 
diff --git a/Doc/library/heapq.rst b/Doc/library/heapq.rst
index e29a31b..45720bf 100644
--- a/Doc/library/heapq.rst
+++ b/Doc/library/heapq.rst
@@ -242,7 +242,7 @@ for a tournament.  The numbers below are *k*, not ``a[k]``::
 
    15 16   17 18   19 20   21 22   23 24   25 26   27 28   29 30
 
-In the tree above, each cell *k* is topping ``2*k+1`` and ``2*k+2``. In an usual
+In the tree above, each cell *k* is topping ``2*k+1`` and ``2*k+2``. In a usual
 binary tournament we see in sports, each cell is the winner over the two cells
 it tops, and we can trace the winner down the tree to see all opponents s/he
 had.  However, in many computer applications of such tournaments, we do not need
diff --git a/Doc/library/logging.handlers.rst b/Doc/library/logging.handlers.rst
index 90efc45..f89d6c3 100644
--- a/Doc/library/logging.handlers.rst
+++ b/Doc/library/logging.handlers.rst
@@ -874,7 +874,7 @@ supports sending logging messages to a Web server, using either ``GET`` or
 
    .. method:: emit(record)
 
-      Sends the record to the Web server as an URL-encoded dictionary. The
+      Sends the record to the Web server as a URL-encoded dictionary. The
       :meth:`mapLogRecord` method is used to convert the record to the
       dictionary to be sent.
 
diff --git a/Doc/library/os.rst b/Doc/library/os.rst
index 289276a..051db99 100644
--- a/Doc/library/os.rst
+++ b/Doc/library/os.rst
@@ -1762,7 +1762,7 @@ features:
    ``os.path.join(os.path.dirname(path), result)``.
 
    If the *path* is a string object, the result will also be a string object,
-   and the call may raise an UnicodeDecodeError. If the *path* is a bytes
+   and the call may raise a UnicodeDecodeError. If the *path* is a bytes
    object, the result will be a bytes object.
 
    This function can also support :ref:`paths relative to directory descriptors
diff --git a/Doc/library/re.rst b/Doc/library/re.rst
index 1df768c..fdd5083 100644
--- a/Doc/library/re.rst
+++ b/Doc/library/re.rst
@@ -12,7 +12,7 @@ those found in Perl.
 
 Both patterns and strings to be searched can be Unicode strings as well as
 8-bit strings. However, Unicode strings and 8-bit strings cannot be mixed:
-that is, you cannot match an Unicode string with a byte pattern or
+that is, you cannot match a Unicode string with a byte pattern or
 vice-versa; similarly, when asking for a substitution, the replacement
 string must be of the same type as both the pattern and the search string.
 
diff --git a/Doc/library/tkinter.ttk.rst b/Doc/library/tkinter.ttk.rst
index 4efdfac..7aebddc 100644
--- a/Doc/library/tkinter.ttk.rst
+++ b/Doc/library/tkinter.ttk.rst
@@ -701,7 +701,7 @@ the widget option ``displaycolumns``. The tree widget can also display column
 headings. Columns may be accessed by number or symbolic names listed in the
 widget option columns. See `Column Identifiers`_.
 
-Each item is identified by an unique name. The widget will generate item IDs
+Each item is identified by a unique name. The widget will generate item IDs
 if they are not supplied by the caller. There is a distinguished root item,
 named ``{}``. The root item itself is not displayed; its children appear at the
 top level of the hierarchy.
diff --git a/Doc/library/webbrowser.rst b/Doc/library/webbrowser.rst
index aa5e4ad..17c6dc3 100644
--- a/Doc/library/webbrowser.rst
+++ b/Doc/library/webbrowser.rst
@@ -33,7 +33,7 @@ browsers are not available on Unix, the controlling process will launch a new
 browser and wait.
 
 The script :program:`webbrowser` can be used as a command-line interface for the
-module. It accepts an URL as the argument. It accepts the following optional
+module. It accepts a URL as the argument. It accepts the following optional
 parameters: ``-n`` opens the URL in a new browser window, if possible;
 ``-t`` opens the URL in a new browser page ("tab"). The options are,
 naturally, mutually exclusive.  Usage example::
diff --git a/Doc/library/xml.etree.elementtree.rst b/Doc/library/xml.etree.elementtree.rst
index fe7ad98..01fccb3 100644
--- a/Doc/library/xml.etree.elementtree.rst
+++ b/Doc/library/xml.etree.elementtree.rst
@@ -978,7 +978,7 @@ QName Objects
    to get proper namespace handling on output.  *text_or_uri* is a string
    containing the QName value, in the form {uri}local, or, if the tag argument
    is given, the URI part of a QName.  If *tag* is given, the first argument is
-   interpreted as an URI, and this argument is interpreted as a local name.
+   interpreted as a URI, and this argument is interpreted as a local name.
    :class:`QName` instances are opaque.
 
 
diff --git a/Doc/library/xml.sax.reader.rst b/Doc/library/xml.sax.reader.rst
index 31ca260..b4acd4c 100644
--- a/Doc/library/xml.sax.reader.rst
+++ b/Doc/library/xml.sax.reader.rst
@@ -98,7 +98,7 @@ The :class:`XMLReader` interface supports the following methods:
 
    Process an input source, producing SAX events. The *source* object can be a
    system identifier (a string identifying the input source -- typically a file
-   name or an URL), a file-like object, or an :class:`InputSource` object. When
+   name or a URL), a file-like object, or an :class:`InputSource` object. When
    :meth:`parse` returns, the input is completely processed, and the parser object
    can be discarded or reset.
 
diff --git a/Doc/library/xmlrpc.client.rst b/Doc/library/xmlrpc.client.rst
index a12e6e1..9805168 100644
--- a/Doc/library/xmlrpc.client.rst
+++ b/Doc/library/xmlrpc.client.rst
@@ -420,7 +420,7 @@ by providing an invalid URI::
 
    import xmlrpc.client
 
-   # create a ServerProxy with an URI that doesn't respond to XMLRPC requests
+   # create a ServerProxy with a URI that doesn't respond to XMLRPC requests
    proxy = xmlrpc.client.ServerProxy("http://google.com/")
 
    try:
diff --git a/Include/bytesobject.h b/Include/bytesobject.h
index 8469112..4578069 100644
--- a/Include/bytesobject.h
+++ b/Include/bytesobject.h
@@ -89,7 +89,7 @@ PyAPI_FUNC(PyObject *) _PyBytes_Join(PyObject *sep, PyObject *x);
 #endif
 
 /* Provides access to the internal data buffer and size of a string
-   object or the default encoded version of an Unicode object. Passing
+   object or the default encoded version of a Unicode object. Passing
    NULL as *len parameter will force the string buffer to be
    0-terminated (passing a string with embedded NULL characters will
    cause an exception).  */
diff --git a/Include/unicodeobject.h b/Include/unicodeobject.h
index 55d553d..791da0e 100644
--- a/Include/unicodeobject.h
+++ b/Include/unicodeobject.h
@@ -823,7 +823,7 @@ PyAPI_FUNC(int) PyUnicode_WriteChar(
 PyAPI_FUNC(Py_UNICODE) PyUnicode_GetMax(void);
 #endif
 
-/* Resize an Unicode object. The length is the number of characters, except
+/* Resize a Unicode object. The length is the number of characters, except
    if the kind of the string is PyUnicode_WCHAR_KIND: in this case, the length
    is the number of Py_UNICODE characters.
 
@@ -844,17 +844,13 @@ PyAPI_FUNC(int) PyUnicode_Resize(
     Py_ssize_t length           /* New length */
     );
 
-/* Coerce obj to an Unicode object and return a reference with
-   *incremented* refcount.
+/* Decode obj to an Unicode object.
 
-   Coercion is done in the following way:
+   bytes, bytearray and other bytes-like objects are decoded according to the
+   given encoding and error handler. The encoding and error handler can be
+   NULL to have the interface use UTF-8 and "strict".
 
-   1. bytes, bytearray and other bytes-like objects are decoded
-      under the assumptions that they contain data using the UTF-8
-      encoding. Decoding is done in "strict" mode.
-
-   2. All other objects (including Unicode objects) raise an
-      exception.
+   All other objects (including Unicode objects) raise an exception.
 
    The API returns NULL in case of an error. The caller is responsible
    for decref'ing the returned objects.
@@ -867,13 +863,9 @@ PyAPI_FUNC(PyObject*) PyUnicode_FromEncodedObject(
     const char *errors          /* error handling */
     );
 
-/* Coerce obj to an Unicode object and return a reference with
-   *incremented* refcount.
-
-   Unicode objects are passed back as-is (subclasses are converted to
-   true Unicode objects), all other objects are delegated to
-   PyUnicode_FromEncodedObject(obj, NULL, "strict") which results in
-   using UTF-8 encoding as basis for decoding the object.
+/* Copy an instance of a Unicode subtype to a new true Unicode object if
+   necessary. If obj is already a true Unicode object (not a subtype), return
+   the reference with *incremented* refcount.
 
    The API returns NULL in case of an error. The caller is responsible
    for decref'ing the returned objects.
@@ -998,7 +990,7 @@ _PyUnicodeWriter_WriteLatin1String(_PyUnicodeWriter *writer,
     Py_ssize_t len             /* length in bytes */
     );
 
-/* Get the value of the writer as an Unicode string. Clear the
+/* Get the value of the writer as a Unicode string. Clear the
    buffer of the writer. Raise an exception and return NULL
    on error. */
 PyAPI_FUNC(PyObject *)
diff --git a/Lib/asyncio/windows_events.py b/Lib/asyncio/windows_events.py
index 922594f..7be3e02 100644
--- a/Lib/asyncio/windows_events.py
+++ b/Lib/asyncio/windows_events.py
@@ -197,7 +197,7 @@ class _WaitHandleFuture(_BaseWaitHandleFuture):
         #
         # If the IocpProactor already received the event, it's safe to call
         # _unregister() because we kept a reference to the Overlapped object
-        # which is used as an unique key.
+        # which is used as a unique key.
         self._proactor._unregister(self._ov)
         self._proactor = None
 
diff --git a/Lib/email/utils.py b/Lib/email/utils.py
index 5080d81..a759d23 100644
--- a/Lib/email/utils.py
+++ b/Lib/email/utils.py
@@ -87,7 +87,7 @@ def formataddr(pair, charset='utf-8'):
     'utf-8'.
     """
     name, address = pair
-    # The address MUST (per RFC) be ascii, so raise an UnicodeError if it isn't.
+    # The address MUST (per RFC) be ascii, so raise a UnicodeError if it isn't.
     address.encode('ascii')
     if name:
         try:
diff --git a/Lib/heapq.py b/Lib/heapq.py
index 07af37e..0b3e89a 100644
--- a/Lib/heapq.py
+++ b/Lib/heapq.py
@@ -54,7 +54,7 @@ representation for a tournament.  The numbers below are `k', not a[k]:
 
 
 In the tree above, each cell `k' is topping `2*k+1' and `2*k+2'.  In
-an usual binary tournament we see in sports, each cell is the winner
+a usual binary tournament we see in sports, each cell is the winner
 over the two cells it tops, and we can trace the winner down the tree
 to see all opponents s/he had.  However, in many computer applications
 of such tournaments, we do not need to trace the history of a winner.
diff --git a/Lib/nntplib.py b/Lib/nntplib.py
index a75faad..28cd099 100644
--- a/Lib/nntplib.py
+++ b/Lib/nntplib.py
@@ -165,7 +165,7 @@ ArticleInfo = collections.namedtuple('ArticleInfo',
 
 # Helper function(s)
 def decode_header(header_str):
-    """Takes an unicode string representing a munged header value
+    """Takes a unicode string representing a munged header value
     and decodes it as a (possibly non-ASCII) readable value."""
     parts = []
     for v, enc in _email_decode_header(header_str):
@@ -420,7 +420,7 @@ class _NNTPBase:
 
     def _putcmd(self, line):
         """Internal: send one command to the server (through _putline()).
-        The `line` must be an unicode string."""
+        The `line` must be a unicode string."""
         if self.debugging: print('*cmd*', repr(line))
         line = line.encode(self.encoding, self.errors)
         self._putline(line)
@@ -445,7 +445,7 @@ class _NNTPBase:
     def _getresp(self):
         """Internal: get a response from the server.
         Raise various errors if the response indicates an error.
-        Returns an unicode string."""
+        Returns a unicode string."""
         resp = self._getline()
         if self.debugging: print('*resp*', repr(resp))
         resp = resp.decode(self.encoding, self.errors)
@@ -462,7 +462,7 @@ class _NNTPBase:
         """Internal: get a response plus following text from the server.
         Raise various errors if the response indicates an error.
 
-        Returns a (response, lines) tuple where `response` is an unicode
+        Returns a (response, lines) tuple where `response` is a unicode
         string and `lines` is a list of bytes objects.
         If `file` is a file-like object, it must be open in binary mode.
         """
diff --git a/Lib/ntpath.py b/Lib/ntpath.py
index 9cc5ca7..af6a709 100644
--- a/Lib/ntpath.py
+++ b/Lib/ntpath.py
@@ -177,7 +177,7 @@ def splitunc(p):
     Return a 2-tuple (unc, rest); either part may be empty.
     If unc is not empty, it has the form '//host/mount' (or similar
     using backslashes).  unc+rest is always the input path.
-    Paths containing drive letters never have an UNC part.
+    Paths containing drive letters never have a UNC part.
     """
     import warnings
     warnings.warn("ntpath.splitunc is deprecated, use ntpath.splitdrive instead",
diff --git a/Lib/test/test_codecs.py b/Lib/test/test_codecs.py
index 4740b68..df8f961 100644
--- a/Lib/test/test_codecs.py
+++ b/Lib/test/test_codecs.py
@@ -2401,7 +2401,7 @@ class TypesTest(unittest.TestCase):
             self.assertRaises(TypeError, decoder, "xxx")
 
     def test_unicode_escape(self):
-        # Escape-decoding an unicode string is supported ang gives the same
+        # Escape-decoding a unicode string is supported ang gives the same
         # result as decoding the equivalent ASCII bytes string.
         self.assertEqual(codecs.unicode_escape_decode(r"\u1234"), ("\u1234", 6))
         self.assertEqual(codecs.unicode_escape_decode(br"\u1234"), ("\u1234", 6))
diff --git a/Lib/test/test_multibytecodec.py b/Lib/test/test_multibytecodec.py
index 2929f98..8d7a213 100644
--- a/Lib/test/test_multibytecodec.py
+++ b/Lib/test/test_multibytecodec.py
@@ -67,7 +67,7 @@ class Test_MultibyteCodec(unittest.TestCase):
                           _multibytecodec.MultibyteStreamWriter, None)
 
     def test_decode_unicode(self):
-        # Trying to decode an unicode string should raise a TypeError
+        # Trying to decode a unicode string should raise a TypeError
         for enc in ALL_CJKENCODINGS:
             self.assertRaises(TypeError, codecs.getdecoder(enc), "")
 
@@ -160,7 +160,7 @@ class Test_IncrementalDecoder(unittest.TestCase):
         self.assertEqual(decoder.decode(b'B@$'), '\u4e16')
 
     def test_decode_unicode(self):
-        # Trying to decode an unicode string should raise a TypeError
+        # Trying to decode a unicode string should raise a TypeError
         for enc in ALL_CJKENCODINGS:
             decoder = codecs.getincrementaldecoder(enc)()
             self.assertRaises(TypeError, decoder.decode, "")
diff --git a/Lib/test/test_nntplib.py b/Lib/test/test_nntplib.py
index 3c69c3e..994532b 100644
--- a/Lib/test/test_nntplib.py
+++ b/Lib/test/test_nntplib.py
@@ -609,7 +609,7 @@ class NNTPv1Handler:
                     "\t\t6683\t16"
                     "\t"
                     "\n"
-                # An UTF-8 overview line from fr.comp.lang.python
+                # A UTF-8 overview line from fr.comp.lang.python
                 "59\tRe: Message d'erreur incompréhensible (par moi)"
                     "\tEric Brunel <eric.brunel@pragmadev.nospam.com>"
                     "\tWed, 15 Sep 2010 18:09:15 +0200"
diff --git a/Lib/test/test_unicode.py b/Lib/test/test_unicode.py
index ab263ab..a38e7b1 100644
--- a/Lib/test/test_unicode.py
+++ b/Lib/test/test_unicode.py
@@ -1774,7 +1774,7 @@ class UnicodeTest(string_tests.CommonTest,
 
     def assertCorrectUTF8Decoding(self, seq, res, err):
         """
-        Check that an invalid UTF-8 sequence raises an UnicodeDecodeError when
+        Check that an invalid UTF-8 sequence raises a UnicodeDecodeError when
         'strict' is used, returns res when 'replace' is used, and that doesn't
         return anything when 'ignore' is used.
         """
diff --git a/Lib/test/test_zlib.py b/Lib/test/test_zlib.py
index ca30116..0978b79 100644
--- a/Lib/test/test_zlib.py
+++ b/Lib/test/test_zlib.py
@@ -175,7 +175,7 @@ class CompressTestCase(BaseCompressTestCase, unittest.TestCase):
             self.assertEqual(zlib.decompress(ob), data)
 
     def test_incomplete_stream(self):
-        # An useful error message is given
+        # A useful error message is given
         x = zlib.compress(HAMLET_SCENE)
         self.assertRaisesRegex(zlib.error,
             "Error -5 while decompressing data: incomplete or truncated stream",
diff --git a/Misc/HISTORY b/Misc/HISTORY
index f964f5f..a8de7f9 100644
--- a/Misc/HISTORY
+++ b/Misc/HISTORY
@@ -2237,7 +2237,7 @@ Library
   attribute which allows setting custom per-pickler reduction functions.
   Patch by sbt.
 
-- Issue #14177: marshal.loads() now raises TypeError when given an unicode
+- Issue #14177: marshal.loads() now raises TypeError when given a unicode
   string.  Patch by Guilherme Gonçalves.
 
 - Issue #13550: Remove the debug machinery from the threading module: remove
@@ -8304,7 +8304,7 @@ Library
 - Issue #1664: Make nntplib IPv6-capable. Patch by Derek Morr.
 
 - Issue #5006: Better handling of unicode byte-order marks (BOM) in the io
-  library. This means, for example, that opening an UTF-16 text file in
+  library. This means, for example, that opening a UTF-16 text file in
   append mode doesn't add a BOM at the end of the file if the file isn't
   empty.
 
@@ -9328,7 +9328,7 @@ Library
 - Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
   Gabriel Genellina.
 
-- Issue #4574: reading an UTF16-encoded text file crashes if \r on 64-char
+- Issue #4574: reading a UTF16-encoded text file crashes if \r on 64-char
   boundary.
 
 - Issue #4223: inspect.getsource() will now correctly display source code
@@ -9929,7 +9929,7 @@ Extension Modules
   exploitation of poor argument checking.
 
 - bsddb code updated to version 4.7.3pre2. This code is the same than
-  Python 2.6 one, since the intention is to keep an unified 2.x/3.x codebase.
+  Python 2.6 one, since the intention is to keep a unified 2.x/3.x codebase.
   The Python code is automatically translated using "2to3". Please, do not
   update this code in Python 3.0 by hand. Update the 2.6 one and then
   do "2to3".
@@ -18936,7 +18936,7 @@ Core language, builtins, and interpreter
 
 - There is a new Unicode companion to the PyObject_Str() API
   called PyObject_Unicode(). It behaves in the same way as the
-  former, but assures that the returned value is an Unicode object
+  former, but assures that the returned value is a Unicode object
   (applying the usual coercion if necessary).
 
 - The comparison operators support "rich comparison overloading" (PEP
diff --git a/Misc/NEWS b/Misc/NEWS
index 6f58482..3929e15 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -2834,7 +2834,7 @@ Core and Builtins
   static type in some cases.
 
 - Issue #15859: PyUnicode_EncodeFSDefault(), PyUnicode_EncodeMBCS() and
-  PyUnicode_EncodeCodePage() now raise an exception if the object is not an
+  PyUnicode_EncodeCodePage() now raise an exception if the object is not a
   Unicode object. For PyUnicode_EncodeFSDefault(), it was already the case on
   platforms other than Windows. Patch written by Campbell Barton.
 
@@ -3925,7 +3925,7 @@ Library
 - Issue #21226: Set up modules properly in PyImport_ExecCodeModuleObject
   (and friends).
 
-- Issue #21398: Fix an unicode error in the pydoc pager when the documentation
+- Issue #21398: Fix a unicode error in the pydoc pager when the documentation
   contains characters not encodable to the stdout encoding.
 
 - Issue #16531: ipaddress.IPv4Network and ipaddress.IPv6Network now accept
@@ -6929,7 +6929,7 @@ Core and Builtins
 - Issue #17173: Remove uses of locale-dependent C functions (isalpha() etc.)
   in the interpreter.
 
-- Issue #17137: When an Unicode string is resized, the internal wide character
+- Issue #17137: When a Unicode string is resized, the internal wide character
   string (wstr) format is now cleared.
 
 - Issue #17043: The unicode-internal decoder no longer read past the end of
diff --git a/Modules/_heapqmodule.c b/Modules/_heapqmodule.c
index 1c37c75..b499e1f 100644
--- a/Modules/_heapqmodule.c
+++ b/Modules/_heapqmodule.c
@@ -550,7 +550,7 @@ representation for a tournament.  The numbers below are `k', not a[k]:\n\
 \n\
 \n\
 In the tree above, each cell `k' is topping `2*k+1' and `2*k+2'.  In\n\
-an usual binary tournament we see in sports, each cell is the winner\n\
+a usual binary tournament we see in sports, each cell is the winner\n\
 over the two cells it tops, and we can trace the winner down the tree\n\
 to see all opponents s/he had.  However, in many computer applications\n\
 of such tournaments, we do not need to trace the history of a winner.\n\
diff --git a/Modules/_pickle.c b/Modules/_pickle.c
index 049b737..545f0a4 100644
--- a/Modules/_pickle.c
+++ b/Modules/_pickle.c
@@ -1119,7 +1119,7 @@ _Unpickler_SkipConsumed(UnpicklerObject *self)
         return 0;
 
     assert(self->peek);  /* otherwise we did something wrong */
-    /* This makes an useless copy... */
+    /* This makes a useless copy... */
     r = PyObject_CallFunction(self->read, "n", consumed);
     if (r == NULL)
         return -1;
diff --git a/Modules/_tracemalloc.c b/Modules/_tracemalloc.c
index ca0ed3b..86cdbd2 100644
--- a/Modules/_tracemalloc.c
+++ b/Modules/_tracemalloc.c
@@ -379,7 +379,7 @@ tracemalloc_get_frame(PyFrameObject *pyframe, frame_t *frame)
 
     if (!PyUnicode_Check(filename)) {
 #ifdef TRACE_DEBUG
-        tracemalloc_error("filename is not an unicode string");
+        tracemalloc_error("filename is not a unicode string");
 #endif
         return;
     }
diff --git a/Objects/codeobject.c b/Objects/codeobject.c
index e3d28e3..f089f75 100644
--- a/Objects/codeobject.c
+++ b/Objects/codeobject.c
@@ -520,7 +520,7 @@ _PyCode_ConstantKey(PyObject *op)
         return key;
     }
     else {
-        /* for other types, use the object identifier as an unique identifier
+        /* for other types, use the object identifier as a unique identifier
          * to ensure that they are seen as unequal. */
         PyObject *obj_id = PyLong_FromVoidPtr(op);
         if (obj_id == NULL)
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index d3bb13a..f1de3d5 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -850,7 +850,7 @@ Py_LOCAL_INLINE(Py_ssize_t) findchar(const void *s, int kind,
 }
 
 #ifdef Py_DEBUG
-/* Fill the data of an Unicode string with invalid characters to detect bugs
+/* Fill the data of a Unicode string with invalid characters to detect bugs
    earlier.
 
    _PyUnicode_CheckConsistency(str, 1) detects invalid characters, at least for
diff --git a/Python/codecs.c b/Python/codecs.c
index d90bf73..fe57d0d 100644
--- a/Python/codecs.c
+++ b/Python/codecs.c
@@ -403,7 +403,7 @@ wrap_codec_error(const char *operation,
                            operation, encoding);
 }
 
-/* Encode an object (e.g. an Unicode object) using the given encoding
+/* Encode an object (e.g. a Unicode object) using the given encoding
    and return the resulting encoded object (usually a Python string).
 
    errors is passed to the encoder factory as argument if non-NULL. */
@@ -450,7 +450,7 @@ _PyCodec_EncodeInternal(PyObject *object,
 }
 
 /* Decode an object (usually a Python string) using the given encoding
-   and return an equivalent object (e.g. an Unicode object).
+   and return an equivalent object (e.g. a Unicode object).
 
    errors is passed to the decoder factory as argument if non-NULL. */