Fix duplicating words words. (GH-6296)

Most of them have been added in 3.7.

Doc/library/asyncio-protocol.rst

@@ -339,7 +339,7 @@ Protocol classes
    control of the receive buffer.
 
    .. versionadded:: 3.7
-      **Important:** this has been been added to asyncio in Python 3.7
+      **Important:** this has been added to asyncio in Python 3.7
       *on a provisional basis*!  Treat it as an experimental API that
       might be changed or removed in Python 3.8.
 
@@ -450,7 +450,7 @@ Streaming protocols with manual receive buffer control
 ------------------------------------------------------
 
 .. versionadded:: 3.7
-   **Important:** :class:`BufferedProtocol` has been been added to
+   **Important:** :class:`BufferedProtocol` has been added to
    asyncio in Python 3.7 *on a provisional basis*!  Consider it as an
    experimental API that might be changed or removed in Python 3.8.
 

Doc/library/contextvars.rst

@@ -253,7 +253,7 @@ client::
         addr = writer.transport.get_extra_info('socket').getpeername()
         client_addr_var.set(addr)
 
-        # In any code that we call is is now possible to get
+        # In any code that we call is now possible to get
         # client's address by calling 'client_addr_var.get()'.
 
         while True:

Doc/library/datetime.rst

@@ -2209,8 +2209,8 @@ Notes:
       :meth:`utcoffset` is transformed into a string of the form
       ±HHMM[SS[.uuuuuu]], where HH is a 2-digit string giving the number of UTC
       offset hours, and MM is a 2-digit string giving the number of UTC offset
-      minutes, SS is a 2-digit string string giving the number of UTC offset
-      seconds and uuuuuu is a 2-digit string string giving the number of UTC
+      minutes, SS is a 2-digit string giving the number of UTC offset
+      seconds and uuuuuu is a 2-digit string giving the number of UTC
       offset microseconds.  The uuuuuu part is omitted when the offset is a
       whole number of minutes and both the uuuuuu and the SS parts are omitted
       when the offset is a whole number of minutes.  For example, if

Doc/library/test.rst

@@ -1153,7 +1153,7 @@ The :mod:`test.support` module defines the following functions:
    *module*.
 
    The *name_of_module* argument can specify (as a string or tuple thereof) what
-   module(s) an API could be defined in in order to be detected as a public
+   module(s) an API could be defined in order to be detected as a public
    API. One case for this is when *module* imports part of its public API from
    other modules, possibly a C backend (like ``csv`` and its ``_csv``).
 

Doc/whatsnew/3.7.rst

@@ -684,7 +684,7 @@ feature. Instances must be created with :class:`~ssl.SSLContext` methods
 (Contributed by Christian Heimes in :issue:`32951`)
 
 OpenSSL 1.1 APIs for setting the minimum and maximum TLS protocol version are
-available as as :attr:`~ssl.SSLContext.minimum_version` and
+available as :attr:`~ssl.SSLContext.minimum_version` and
 :attr:`~ssl.SSLContext.maximum_version`. Supported protocols are indicated
 by new flags like :data:`~ssl.HAS_TLSv1_1`.
 (Contributed by Christian Heimes in :issue:`32609`.)

Lib/asyncio/protocols.py

@@ -105,7 +105,7 @@ class Protocol(BaseProtocol):
 class BufferedProtocol(BaseProtocol):
     """Interface for stream protocol with manual buffer control.
 
-    Important: this has been been added to asyncio in Python 3.7
+    Important: this has been added to asyncio in Python 3.7
     *on a provisional basis*!  Consider it as an experimental API that
     might be changed or removed in Python 3.8.
 

Lib/idlelib/idle_test/test_editmenu.py

 '''Test (selected) IDLE Edit menu items.
 
-Edit modules have their own test files files
+Edit modules have their own test files
 '''
 from test.support import requires
 requires('gui')

Lib/idlelib/idle_test/test_text.py

@@ -9,7 +9,7 @@ from _tkinter import TclError
 class TextTest(object):
     "Define items common to both sets of tests."
 
-    hw = 'hello\nworld'  # Several tests insert this after after initialization.
+    hw = 'hello\nworld'  # Several tests insert this after initialization.
     hwn = hw+'\n'  # \n present at initialization, before insert
 
     # setUpClass defines cls.Text and maybe cls.root.

Misc/NEWS.d/next/Library/2018-01-18-13-09-00.bpo-32585.qpeijr.rst

-Add Ttk spinbox widget to to tkinter.ttk.  Patch by Alan D Moore.
+Add Ttk spinbox widget to :mod:`tkinter.ttk`.  Patch by Alan D Moore.

Misc/NEWS.d/next/Library/2018-03-18-17-38-48.bpo-32953.t8WAWN.rst

 If a non-dataclass inherits from a frozen dataclass, allow attributes to be
-added to the derived class.  Only attributes from from the frozen dataclass
+added to the derived class.  Only attributes from the frozen dataclass
 cannot be assigned to.  Require all dataclasses in a hierarchy to be either
 all frozen or all non-frozen.

Modules/_datetimemodule.c

@@ -5214,7 +5214,7 @@ get_flip_fold_offset(PyObject *dt)
 
 /* PEP 495 exception: Whenever one or both of the operands in
  * inter-zone comparison is such that its utcoffset() depends
- * on the value of its fold fold attribute, the result is False.
+ * on the value of its fold attribute, the result is False.
  *
  * Return 1 if exception applies, 0 if not,  and -1 on error.
  */