diff --git a/Lib/email/_encoded_words.py b/Lib/email/_encoded_words.py
index e9f6e20..9e0cc75 100644
--- a/Lib/email/_encoded_words.py
+++ b/Lib/email/_encoded_words.py
@@ -14,7 +14,7 @@
 # cte (Content Transfer Encoding) is either 'q' or 'b' (ignoring case).  In
 # theory other letters could be used for other encodings, but in practice this
 # (almost?) never happens.  There could be a public API for adding entries
-# to to the CTE tables, but YAGNI for now.  'q' is Quoted Printable, 'b' is
+# to the CTE tables, but YAGNI for now.  'q' is Quoted Printable, 'b' is
 # Base64.  The meaning of encoded_string should be obvious.  'lang' is optional
 # as indicated by the brackets (they are not part of the syntax) but is almost
 # never encountered in practice.
diff --git a/Lib/email/_header_value_parser.py b/Lib/email/_header_value_parser.py
index 1924ed1..26cfa52 100644
--- a/Lib/email/_header_value_parser.py
+++ b/Lib/email/_header_value_parser.py
@@ -1864,7 +1864,7 @@
     """ dtext = <printable ascii except \ [ ]> / obs-dtext
         obs-dtext = obs-NO-WS-CTL / quoted-pair
 
-    We allow anything except the excluded characters, but but if we find any
+    We allow anything except the excluded characters, but if we find any
     ASCII other than the RFC defined printable ASCII an NonPrintableDefect is
     added to the token's defects list.  Quoted pairs are converted to their
     unquoted values, so what is returned is a ptext token, in this case a
diff --git a/Lib/email/mime/text.py b/Lib/email/mime/text.py
index 80ff950..3b5b09f 100644
--- a/Lib/email/mime/text.py
+++ b/Lib/email/mime/text.py
@@ -26,7 +26,7 @@
         Content-Transfer-Encoding header will also be set.
         """
 
-        # If no _charset was specified, check to see see if there are non-ascii
+        # If no _charset was specified, check to see if there are non-ascii
         # characters present. If not, use 'us-ascii', otherwise use utf-8.
         # XXX: This can be removed once #7304 is fixed.
         if _charset is None:
diff --git a/Lib/email/policy.py b/Lib/email/policy.py
index a17f598..38e88af 100644
--- a/Lib/email/policy.py
+++ b/Lib/email/policy.py
@@ -23,7 +23,7 @@
     """+
     PROVISIONAL
 
-    The API extensions enabled by this this policy are currently provisional.
+    The API extensions enabled by this policy are currently provisional.
     Refer to the documentation for details.
 
     This policy adds new header parsing and folding algorithms.  Instead of
diff --git a/Lib/test/test_decimal.py b/Lib/test/test_decimal.py
index 69a2faf..e8256a5 100644
--- a/Lib/test/test_decimal.py
+++ b/Lib/test/test_decimal.py
@@ -4492,7 +4492,7 @@
             x = Decimal(2**578) ** Decimal("-0.5")
 
     def test_py_immutability_operations(self):
-        # Do operations and check that it didn't change change internal objects.
+        # Do operations and check that it didn't change internal objects.
         Decimal = P.Decimal
         DefaultContext = P.DefaultContext
         setcontext = P.setcontext
diff --git a/Lib/tkinter/__init__.py b/Lib/tkinter/__init__.py
index ea23705..f619786 100644
--- a/Lib/tkinter/__init__.py
+++ b/Lib/tkinter/__init__.py
@@ -3152,7 +3152,7 @@
     def peer_create(self, newPathName, cnf={}, **kw): # new in Tk 8.5
         """Creates a peer text widget with the given newPathName, and any
         optional standard configuration options. By default the peer will
-        have the same start and and end line as the parent widget, but
+        have the same start and end line as the parent widget, but
         these can be overriden with the standard configuration options."""
         self.tk.call(self._w, 'peer', 'create', newPathName,
             *self._options(cnf, kw))
diff --git a/Lib/unittest/mock.py b/Lib/unittest/mock.py
index 324cf39..8361fde 100644
--- a/Lib/unittest/mock.py
+++ b/Lib/unittest/mock.py
@@ -1417,7 +1417,7 @@
     you pass in `create=True`, and the attribute doesn't exist, patch will
     create the attribute for you when the patched function is called, and
     delete it again afterwards. This is useful for writing tests against
-    attributes that your production code creates at runtime. It is off by by
+    attributes that your production code creates at runtime. It is off by
     default because it can be dangerous. With it switched on you can write
     passing tests against APIs that don't actually exist!