Issue #25523: Correct "a" article to "an" article

This changes the main documentation, doc strings, source code comments, and a
couple error messages in the test suite. In some cases the word was removed
or edited some other way to fix the grammar.

5 files changed, 6 insertions, 6 deletions

diff --git a/Doc/whatsnew/2.1.rst b/Doc/whatsnew/2.1.rst
index ff15662..6de5bf5 100644
--- a/Doc/whatsnew/2.1.rst
+++ b/Doc/whatsnew/2.1.rst
@@ -555,7 +555,7 @@ will include metadata, making it possible to build automated cataloguing systems
 and experiment with them.  With the result experience, perhaps it'll be possible
 to design a really good catalog and then build support for it into Python 2.2.
 For example, the Distutils :command:`sdist` and :command:`bdist_\*` commands
-could support a ``upload`` option that would automatically upload your
+could support an ``upload`` option that would automatically upload your
 package to a catalog server.
 
 You can start creating packages containing :file:`PKG-INFO` even if you're not
diff --git a/Doc/whatsnew/2.3.rst b/Doc/whatsnew/2.3.rst
index f478c09..9d99074 100644
--- a/Doc/whatsnew/2.3.rst
+++ b/Doc/whatsnew/2.3.rst
@@ -411,7 +411,7 @@ PEP 279: enumerate()
 
 A new built-in function, :func:`enumerate`, will make certain loops a bit
 clearer.  ``enumerate(thing)``, where *thing* is either an iterator or a
-sequence, returns a iterator that will return ``(0, thing[0])``, ``(1,
+sequence, returns an iterator that will return ``(0, thing[0])``, ``(1,
 thing[1])``, ``(2, thing[2])``, and so forth.
 
 A common idiom to change every element of a list looks like this::
diff --git a/Doc/whatsnew/3.1.rst b/Doc/whatsnew/3.1.rst
index f272da4..c1a1687 100644
--- a/Doc/whatsnew/3.1.rst
+++ b/Doc/whatsnew/3.1.rst
@@ -336,7 +336,7 @@ New, Improved, and Deprecated Modules
   (Contributed by David Laban; :issue:`4739`.)
 
 * The :mod:`unittest` module now supports skipping individual tests or classes
-  of tests. And it supports marking a test as a expected failure, a test that
+  of tests. And it supports marking a test as an expected failure, a test that
   is known to be broken, but shouldn't be counted as a failure on a
   TestResult::
 
diff --git a/Doc/whatsnew/3.2.rst b/Doc/whatsnew/3.2.rst
index 5171f3c..5822504 100644
--- a/Doc/whatsnew/3.2.rst
+++ b/Doc/whatsnew/3.2.rst
@@ -788,7 +788,7 @@ functools
   :issue:`8814`.)
 
 * To help write classes with rich comparison methods, a new decorator
-  :func:`functools.total_ordering` will use a existing equality and inequality
+  :func:`functools.total_ordering` will use existing equality and inequality
   methods to fill in the remaining methods.
 
   For example, supplying *__eq__* and *__lt__* will enable
@@ -1399,7 +1399,7 @@ Aides and Brian Curtin in :issue:`9962`, :issue:`1675951`, :issue:`7471` and
 
 Also, the :class:`zipfile.ZipExtFile` class was reworked internally to represent
 files stored inside an archive.  The new implementation is significantly faster
-and can be wrapped in a :class:`io.BufferedReader` object for more speedups.  It
+and can be wrapped in an :class:`io.BufferedReader` object for more speedups.  It
 also solves an issue where interleaved calls to *read* and *readline* gave the
 wrong results.
 
diff --git a/Doc/whatsnew/3.3.rst b/Doc/whatsnew/3.3.rst
index 1d4ce72..48379d9 100644
--- a/Doc/whatsnew/3.3.rst
+++ b/Doc/whatsnew/3.3.rst
@@ -1421,7 +1421,7 @@ can be used to directly manage when the accumlated headers are sent.
 
 :class:`http.client.HTTPResponse` now has a
 :meth:`~http.client.HTTPResponse.readinto` method, which means it can be used
-as a :class:`io.RawIOBase` class.  (Contributed by John Kuhn in
+as an :class:`io.RawIOBase` class.  (Contributed by John Kuhn in
 :issue:`13464`.)