diff --git a/Doc/library/abc.rst b/Doc/library/abc.rst
index bf3b0b1..8ab90cc 100644
--- a/Doc/library/abc.rst
+++ b/Doc/library/abc.rst
@@ -42,15 +42,15 @@
       Register *subclass* as a "virtual subclass" of this ABC. For
       example::
 
-	from abc import ABCMeta
+        from abc import ABCMeta
 
-	class MyABC(metaclass=ABCMeta):
-	    pass
+        class MyABC(metaclass=ABCMeta):
+            pass
 
-	MyABC.register(tuple)
+        MyABC.register(tuple)
 
-	assert issubclass(tuple, MyABC)
-	assert isinstance((), MyABC)
+        assert issubclass(tuple, MyABC)
+        assert isinstance((), MyABC)
 
    You can also override this method in an abstract base class:
 
diff --git a/Doc/library/collections.rst b/Doc/library/collections.rst
index f41abd6..4045d2e 100644
--- a/Doc/library/collections.rst
+++ b/Doc/library/collections.rst
@@ -41,7 +41,7 @@
 :class:`Hashable`                                 ``__hash__``
 :class:`Iterable`                                 ``__iter__``
 :class:`Iterator`          :class:`Iterable`      ``__next__``            ``__iter__``
-:class:`Sized`          			  ``__len__``
+:class:`Sized`                                    ``__len__``
 :class:`Callable`                                 ``__call__``
 
 :class:`Sequence`          :class:`Sized`,        ``__getitem__``         ``__contains__``. ``__iter__``, ``__reversed__``.
@@ -68,7 +68,7 @@
 :class:`MutableMapping`    :class:`Mapping`       ``__getitem__``         Inherited Mapping methods and
                                                   ``__setitem__``,        ``pop``, ``popitem``, ``clear``, ``update``,
                                                   ``__delitem__``,        and ``setdefault``
-						  ``__iter__``, and
+                                                  ``__iter__``, and
                                                   ``__len__``
 
 :class:`MappingView`       :class:`Sized`                                 ``__len__``
@@ -84,7 +84,7 @@
 
     size = None
     if isinstance(myvar, collections.Sized):
-	size = len(myvar)
+        size = len(myvar)
 
 Several of the ABCs are also useful as mixins that make it easier to develop
 classes supporting container APIs.  For example, to write a class supporting
diff --git a/Doc/library/gettext.rst b/Doc/library/gettext.rst
index cd229e7..a295c0e 100644
--- a/Doc/library/gettext.rst
+++ b/Doc/library/gettext.rst
@@ -551,10 +551,9 @@
 
    animals = ['mollusk',
               'albatross',
-   	   'rat',
-   	   'penguin',
-   	   'python',
-   	   ]
+              'rat',
+              'penguin',
+              'python', ]
    # ...
    for a in animals:
        print(a)
@@ -569,10 +568,9 @@
 
    animals = [_('mollusk'),
               _('albatross'),
-   	   _('rat'),
-   	   _('penguin'),
-   	   _('python'),
-   	   ]
+              _('rat'),
+              _('penguin'),
+              _('python'), ]
 
    del _
 
@@ -595,10 +593,9 @@
 
    animals = [N_('mollusk'),
               N_('albatross'),
-   	   N_('rat'),
-   	   N_('penguin'),
-   	   N_('python'),
-   	   ]
+              N_('rat'),
+              N_('penguin'),
+              N_('python'), ]
 
    # ...
    for a in animals:
diff --git a/Doc/library/multiprocessing.rst b/Doc/library/multiprocessing.rst
index 7e44423..e5dd1ed 100644
--- a/Doc/library/multiprocessing.rst
+++ b/Doc/library/multiprocessing.rst
@@ -35,7 +35,7 @@
         >>> from multiprocessing import Pool
         >>> p = Pool(5)
         >>> def f(x):
-        ... 	return x*x
+        ...     return x*x
         ...
         >>> p.map(f, [1,2,3])
         Process PoolWorker-1:
diff --git a/Doc/library/optparse.rst b/Doc/library/optparse.rst
index 3805d96..4e9bb23 100644
--- a/Doc/library/optparse.rst
+++ b/Doc/library/optparse.rst
@@ -543,8 +543,8 @@
 :class:`OptionGroup` to a parser is easy::
 
     group = OptionGroup(parser, "Dangerous Options",
-			"Caution: use these options at your own risk.  "
-			"It is believed that some of them bite.")
+                        "Caution: use these options at your own risk.  "
+                        "It is believed that some of them bite.")
     group.add_option("-g", action="store_true", help="Group option.")
     parser.add_option_group(group)
 
@@ -558,12 +558,12 @@
       -q, --quiet          be vewwy quiet (I'm hunting wabbits)
       -fFILE, --file=FILE  write output to FILE
       -mMODE, --mode=MODE  interaction mode: one of 'novice', 'intermediate'
-			   [default], 'expert'
+                           [default], 'expert'
 
       Dangerous Options:
-	Caution: use of these options is at your own risk.  It is believed that
-	some of them bite.
-	-g                 Group option.
+      Caution: use of these options is at your own risk.  It is believed that
+      some of them bite.
+      -g                 Group option.
 
 .. _optparse-printing-version-string:
 
diff --git a/Doc/library/sched.rst b/Doc/library/sched.rst
index cab7f60..f93c9b5 100644
--- a/Doc/library/sched.rst
+++ b/Doc/library/sched.rst
@@ -58,7 +58,7 @@
     ...     print(time.time())
     ...     Timer(5, print_time, ()).start()
     ...     Timer(10, print_time, ()).start()
-    ...     time.sleep(11)	# sleep while time-delay events execute
+    ...     time.sleep(11)  # sleep while time-delay events execute
     ...     print(time.time())
     ...
     >>> print_some_times()
diff --git a/Doc/library/socket.rst b/Doc/library/socket.rst
index c2e3d91..f399dae 100644
--- a/Doc/library/socket.rst
+++ b/Doc/library/socket.rst
@@ -797,17 +797,17 @@
                                  socket.SOCK_STREAM, 0, socket.AI_PASSIVE):
        af, socktype, proto, canonname, sa = res
        try:
-   	s = socket.socket(af, socktype, proto)
+           s = socket.socket(af, socktype, proto)
        except socket.error as msg:
-   	s = None
-   	continue
+           s = None
+           continue
        try:
-   	s.bind(sa)
-   	s.listen(1)
+           s.bind(sa)
+           s.listen(1)
        except socket.error as msg:
-   	s.close()
-   	s = None
-   	continue
+           s.close()
+           s = None
+           continue
        break
    if s is None:
        print('could not open socket')
@@ -832,16 +832,16 @@
    for res in socket.getaddrinfo(HOST, PORT, socket.AF_UNSPEC, socket.SOCK_STREAM):
        af, socktype, proto, canonname, sa = res
        try:
-   	s = socket.socket(af, socktype, proto)
+           s = socket.socket(af, socktype, proto)
        except socket.error as msg:
-   	s = None
-   	continue
+           s = None
+           continue
        try:
-   	s.connect(sa)
+           s.connect(sa)
        except socket.error as msg:
-   	s.close()
-   	s = None
-   	continue
+           s.close()
+           s = None
+           continue
        break
    if s is None:
        print('could not open socket')