Removed duplicated words in in comments and docs.

Lib/asyncio/futures.py

@@ -61,7 +61,7 @@ class itself, but instead to have a reference to a helper object
     the Future is collected, and the helper is present, the helper
     object is also collected, and its __del__() method will log the
     traceback.  When the Future's result() or exception() method is
-    called (and a helper object is present), it removes the the helper
+    called (and a helper object is present), it removes the helper
     object, after calling its clear() method to prevent it from
     logging.
 

Lib/hashlib.py

@@ -172,7 +172,7 @@ def pbkdf2_hmac(hash_name, password, salt, iterations, dklen=None):
 
         def prf(msg, inner=inner, outer=outer):
             # PBKDF2_HMAC uses the password as key. We can re-use the same
-            # digest objects and and just update copies to skip initialization.
+            # digest objects and just update copies to skip initialization.
             icpy = inner.copy()
             ocpy = outer.copy()
             icpy.update(msg)

Lib/test/test_asyncio/test_windows_events.py

@@ -105,7 +105,7 @@ def test_wait_for_handle(self):
 
         _overlapped.SetEvent(event)
 
-        # Wait for for set event;
+        # Wait for set event;
         # result should be True immediately
         fut = self.loop._proactor.wait_for_handle(event, 10)
         start = self.loop.time()

Lib/test/test_docxmlrpc.py

@@ -10,7 +10,7 @@
 PORT = None
 
 def make_request_and_skipIf(condition, reason):
-    # If we skip the test, we have to make a request because the
+    # If we skip the test, we have to make a request because
     # the server created in setUp blocks expecting one to come in.
     if not condition:
         return lambda func: func

Lib/test/test_xmlrpc.py

@@ -517,7 +517,7 @@ def is_unavailable_exception(e):
         return True
 
 def make_request_and_skipIf(condition, reason):
-    # If we skip the test, we have to make a request because the
+    # If we skip the test, we have to make a request because
     # the server created in setUp blocks expecting one to come in.
     if not condition:
         return lambda func: func

Lib/test/test_zipimport_support.py

@@ -57,7 +57,7 @@ class ZipSupportTests(unittest.TestCase):
     # This used to use the ImportHooksBaseTestCase to restore
     # the state of the import related information
     # in the sys module after each test. However, that restores
-    # *too much* information and breaks for the invocation of
+    # *too much* information and breaks for the invocation
     # of test_doctest. So we do our own thing and leave
     # sys.modules alone.
     # We also clear the linecache and zipimport cache

Lib/xml/etree/ElementTree.py

@@ -125,7 +125,7 @@ class Element:
     This class is the reference implementation of the Element interface.
 
     An element's length is its number of subelements.  That means if you
-    you want to check if an element is truly empty, you should check BOTH
+    want to check if an element is truly empty, you should check BOTH
     its length AND its text attribute.
 
     The element tag, attribute names, and attribute values can be either