diff --git a/docs/ref/models/querysets.txt b/docs/ref/models/querysets.txt
index 938ff87cab..7a67438b38 100644
--- a/docs/ref/models/querysets.txt
+++ b/docs/ref/models/querysets.txt
@@ -921,8 +921,10 @@ For example, suppose you have these models::
         toppings = models.ManyToManyField(Topping)
 
         def __str__(self):              # __unicode__ on Python 2
-            return "%s (%s)" % (self.name, ", ".join(topping.name
-                                                     for topping in self.toppings.all()))
+            return "%s (%s)" % (
+                self.name,
+                ", ".join(topping.name or topping in self.toppings.all()),
+            )
 
 and run::
 
@@ -1669,8 +1671,11 @@ This is meant as a shortcut to boilerplatish code. For example::
 This pattern gets quite unwieldy as the number of fields in a model goes up.
 The above example can be rewritten using ``get_or_create()`` like so::
 
-    obj, created = Person.objects.get_or_create(first_name='John', last_name='Lennon',
-                      defaults={'birthday': date(1940, 10, 9)})
+    obj, created = Person.objects.get_or_create(
+        first_name='John',
+        last_name='Lennon',
+        defaults={'birthday': date(1940, 10, 9)},
+    )
 
 Any keyword arguments passed to ``get_or_create()`` — *except* an optional one
 called ``defaults`` — will be used in a :meth:`get()` call. If an object is
diff --git a/docs/ref/utils.txt b/docs/ref/utils.txt
index eadd036cb6..f95ff1017f 100644
--- a/docs/ref/utils.txt
+++ b/docs/ref/utils.txt
@@ -317,7 +317,7 @@ Sample usage::
     >>> feed.add_item(
     ...     title="Hello",
     ...     link="http://www.holovaty.com/test/",
-    ...     description="Testing."
+    ...     description="Testing.",
     ... )
     >>> with open('test.rss', 'w') as fp:
     ...     feed.write(fp, 'utf-8')
@@ -629,15 +629,19 @@ escaping HTML.
 
     So, instead of writing::
 
-        mark_safe("%s <b>%s</b> %s" % (some_html,
-                                        escape(some_text),
-                                        escape(some_other_text),
-                                        ))
+        mark_safe("%s <b>%s</b> %s" % (
+            some_html,
+            escape(some_text),
+            escape(some_other_text),
+        ))
 
     You should instead use::
 
         format_html("{} <b>{}</b> {}",
-                    mark_safe(some_html), some_text, some_other_text)
+            mark_safe(some_html),
+            some_text,
+            some_other_text,
+        )
 
     This has the advantage that you don't need to apply :func:`escape` to each
     argument and risk a bug and an XSS vulnerability if you forget one.
@@ -658,8 +662,10 @@ escaping HTML.
     ``args_generator`` should be an iterator that returns the sequence of
     ``args`` that will be passed to :func:`format_html`. For example::
 
-        format_html_join('\n', "<li>{} {}</li>", ((u.first_name, u.last_name)
-                                                    for u in users))
+        format_html_join(
+            '\n', "<li>{} {}</li>",
+            ((u.first_name, u.last_name) for u in users)
+        )
 
 .. function:: strip_tags(value)
 
diff --git a/docs/topics/db/queries.txt b/docs/topics/db/queries.txt
index be440f7126..57408ee224 100644
--- a/docs/topics/db/queries.txt
+++ b/docs/topics/db/queries.txt
@@ -519,8 +519,7 @@ will return ``Blog`` objects that have an empty ``name`` on the ``author`` and
 also those which have an empty ``author`` on the ``entry``. If you don't want
 those latter objects, you could write::
 
-    Blog.objects.filter(entry__authors__isnull=False,
-            entry__authors__name__isnull=True)
+    Blog.objects.filter(entry__authors__isnull=False, entry__authors__name__isnull=True)
 
 Spanning multi-valued relationships
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -556,14 +555,12 @@ select all blogs that contain entries with both *"Lennon"* in the headline
 and that were published in 2008 (the same entry satisfying both conditions),
 we would write::
 
-    Blog.objects.filter(entry__headline__contains='Lennon',
-            entry__pub_date__year=2008)
+    Blog.objects.filter(entry__headline__contains='Lennon', entry__pub_date__year=2008)
 
 To select all blogs that contain an entry with *"Lennon"* in the headline
 **as well as** an entry that was published in 2008, we would write::
 
-    Blog.objects.filter(entry__headline__contains='Lennon').filter(
-            entry__pub_date__year=2008)
+    Blog.objects.filter(entry__headline__contains='Lennon').filter(entry__pub_date__year=2008)
 
 Suppose there is only one blog that had both entries containing *"Lennon"* and
 entries from 2008, but that none of the entries from 2008 contained *"Lennon"*.
diff --git a/docs/topics/testing/tools.txt b/docs/topics/testing/tools.txt
index 042608efbd..8db06c15a3 100644
--- a/docs/topics/testing/tools.txt
+++ b/docs/topics/testing/tools.txt
@@ -1703,9 +1703,11 @@ and contents::
     class EmailTest(TestCase):
         def test_send_email(self):
             # Send message.
-            mail.send_mail('Subject here', 'Here is the message.',
+            mail.send_mail(
+                'Subject here', 'Here is the message.',
                 'from@example.com', ['to@example.com'],
-                fail_silently=False)
+                fail_silently=False,
+            )
 
             # Test that one message has been sent.
             self.assertEqual(len(mail.outbox), 1)