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.

11 files changed, 12 insertions, 12 deletions

diff --git a/Lib/test/decimaltestdata/fma.decTest b/Lib/test/decimaltestdata/fma.decTest
index b0a81ca..0b188fa 100644
--- a/Lib/test/decimaltestdata/fma.decTest
+++ b/Lib/test/decimaltestdata/fma.decTest
@@ -148,7 +148,7 @@ fmax2018 fma  9.999999 -9.999999  0E+999999  -> -100.000 Inexact Rounded
 fmax2019 fma -9.999999  9.999999  0E+999999  -> -100.000 Inexact Rounded

 fmax2020 fma -9.999999 -9.999999  0E+999999  ->  100.000 Inexact Rounded

 

--- 1999.12.21: next one is a edge case if intermediate longs are used

+-- 1999.12.21: next one is an edge case if intermediate longs are used

 precision: 15

 fmax2059 fma 999999999999 9765625  0E+999999  -> 9.76562499999023E+18 Inexact Rounded

 precision: 30

diff --git a/Lib/test/decimaltestdata/multiply.decTest b/Lib/test/decimaltestdata/multiply.decTest
index 6a23d5a..e8bd77a 100644
--- a/Lib/test/decimaltestdata/multiply.decTest
+++ b/Lib/test/decimaltestdata/multiply.decTest
@@ -49,7 +49,7 @@ mulx018 multiply  9.999999999 -9.999999999 -> -100.000 Inexact Rounded
 mulx019 multiply -9.999999999  9.999999999 -> -100.000 Inexact Rounded
 mulx020 multiply -9.999999999 -9.999999999 ->  100.000 Inexact Rounded
 
--- 1999.12.21: next one is a edge case if intermediate longs are used
+-- 1999.12.21: next one is an edge case if intermediate longs are used
 precision: 15
 mulx059 multiply 999999999999 9765625 -> 9.76562499999023E+18 Inexact Rounded
 precision: 30
diff --git a/Lib/test/pystone.py b/Lib/test/pystone.py
index a41f1e5..59dd99b 100755
--- a/Lib/test/pystone.py
+++ b/Lib/test/pystone.py
@@ -35,7 +35,7 @@ Version History:
                 Under Python 3 version 1.1 would use the normal division
                 operator, resulting in some of the operations mistakenly
                 yielding floats. Version 1.2 instead uses floor division
-                making the benchmark a integer benchmark again.
+                making the benchmark an integer benchmark again.
 
 """
 
diff --git a/Lib/test/support/__init__.py b/Lib/test/support/__init__.py
index 01ca2f8..cdf86e7 100644
--- a/Lib/test/support/__init__.py
+++ b/Lib/test/support/__init__.py
@@ -309,7 +309,7 @@ if sys.platform.startswith("win"):
         # The exponential backoff of the timeout amounts to a total
         # of ~1 second after which the deletion is probably an error
         # anyway.
-        # Testing on a i7@4.3GHz shows that usually only 1 iteration is
+        # Testing on an i7@4.3GHz shows that usually only 1 iteration is
         # required when contention occurs.
         timeout = 0.001
         while timeout < 1.0:
diff --git a/Lib/test/test_cmd.py b/Lib/test/test_cmd.py
index 0c31454..dd8981f 100644
--- a/Lib/test/test_cmd.py
+++ b/Lib/test/test_cmd.py
@@ -110,7 +110,7 @@ class samplecmdclass(cmd.Cmd):
     5  12  19
     6  13
 
-    This is a interactive test, put some commands in the cmdqueue attribute
+    This is an interactive test, put some commands in the cmdqueue attribute
     and let it execute
     This test includes the preloop(), postloop(), default(), emptyline(),
     parseline(), do_help() functions
diff --git a/Lib/test/test_codecs.py b/Lib/test/test_codecs.py
index a1079a1..8fe21fb 100644
--- a/Lib/test/test_codecs.py
+++ b/Lib/test/test_codecs.py
@@ -97,7 +97,7 @@ class ReadTest(MixInCheckStateHandling):
         self.assertEqual(r.read(), "")
         self.assertEqual(r.bytebuffer, b"")
 
-        # do the check again, this time using a incremental decoder
+        # do the check again, this time using an incremental decoder
         d = codecs.getincrementaldecoder(self.encoding)()
         result = ""
         for (c, partialresult) in zip(input.encode(self.encoding), partialresults):
diff --git a/Lib/test/test_email/test_email.py b/Lib/test/test_email/test_email.py
index 61e23fc..e4541fb 100644
--- a/Lib/test/test_email/test_email.py
+++ b/Lib/test/test_email/test_email.py
@@ -3037,7 +3037,7 @@ class TestMiscellaneous(TestEmailBase):
         # issue 1690608.  email.utils.formataddr() should be rfc2047 aware.
         name = "H\u00e4ns W\u00fcrst"
         addr = 'person@dom.ain'
-        # A object without a header_encode method:
+        # An object without a header_encode method:
         bad_charset = object()
         self.assertRaises(AttributeError, utils.formataddr, (name, addr),
             bad_charset)
diff --git a/Lib/test/test_ipaddress.py b/Lib/test/test_ipaddress.py
index bfb5699..95e3f04 100644
--- a/Lib/test/test_ipaddress.py
+++ b/Lib/test/test_ipaddress.py
@@ -1160,7 +1160,7 @@ class IpaddrUnitTest(unittest.TestCase):
         # test a /24 is summarized properly
         self.assertEqual(list(summarize(ip1, ip2))[0],
                          ipaddress.ip_network('1.1.1.0/24'))
-        # test an  IPv4 range that isn't on a network byte boundary
+        # test an IPv4 range that isn't on a network byte boundary
         ip2 = ipaddress.ip_address('1.1.1.8')
         self.assertEqual(list(summarize(ip1, ip2)),
                          [ipaddress.ip_network('1.1.1.0/29'),
@@ -1173,7 +1173,7 @@ class IpaddrUnitTest(unittest.TestCase):
 
         ip1 = ipaddress.ip_address('1::')
         ip2 = ipaddress.ip_address('1:ffff:ffff:ffff:ffff:ffff:ffff:ffff')
-        # test a IPv6 is sumamrized properly
+        # test an IPv6 is summarized properly
         self.assertEqual(list(summarize(ip1, ip2))[0],
                          ipaddress.ip_network('1::/16'))
         # test an IPv6 range that isn't on a network byte boundary
diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py
index 54dd9da2..1f7e49c 100644
--- a/Lib/test/test_os.py
+++ b/Lib/test/test_os.py
@@ -1328,7 +1328,7 @@ class TestInvalidFD(unittest.TestCase):
         except OSError as e:
             self.assertEqual(e.errno, errno.EBADF)
         else:
-            self.fail("%r didn't raise a OSError with a bad file descriptor"
+            self.fail("%r didn't raise an OSError with a bad file descriptor"
                       % f)
 
     @unittest.skipUnless(hasattr(os, 'isatty'), 'test needs os.isatty()')
diff --git a/Lib/test/test_urllib.py b/Lib/test/test_urllib.py
index 16236ef..e100039 100644
--- a/Lib/test/test_urllib.py
+++ b/Lib/test/test_urllib.py
@@ -523,7 +523,7 @@ class urlretrieve_FileTests(unittest.TestCase):
         result = urllib.request.urlretrieve("file:%s" % support.TESTFN)
         self.assertEqual(result[0], support.TESTFN)
         self.assertIsInstance(result[1], email.message.Message,
-                              "did not get a email.message.Message instance "
+                              "did not get an email.message.Message instance "
                               "as second returned value")
 
     def test_copy(self):
diff --git a/Lib/test/test_weakref.py b/Lib/test/test_weakref.py
index 212cf34..4313c1d 100644
--- a/Lib/test/test_weakref.py
+++ b/Lib/test/test_weakref.py
@@ -934,7 +934,7 @@ class SubclassableWeakrefTestCase(TestBase):
 class WeakMethodTestCase(unittest.TestCase):
 
     def _subclass(self):
-        """Return a Object subclass overriding `some_method`."""
+        """Return an Object subclass overriding `some_method`."""
         class C(Object):
             def some_method(self):
                 return 6