Refs #34140 -- Corrected rst code-block and various formatting issues in docs.

docs/topics/db/examples/one_to_one.txt

@@ -74,9 +74,9 @@ p2 doesn't have an associated restaurant:
 
     >>> from django.core.exceptions import ObjectDoesNotExist
     >>> try:
-    >>>     p2.restaurant
-    >>> except ObjectDoesNotExist:
-    >>>     print("There is no restaurant here.")
+    ...     p2.restaurant
+    ... except ObjectDoesNotExist:
+    ...     print("There is no restaurant here.")
     There is no restaurant here.
 
 You can also use ``hasattr`` to avoid the need for exception catching:

docs/topics/db/models.txt

@@ -675,7 +675,9 @@ Field name restrictions
 Django places some restrictions on model field names:
 
 #. A field name cannot be a Python reserved word, because that would result
-   in a Python syntax error. For example::
+   in a Python syntax error. For example:
+
+   .. code-block:: text
 
        class Example(models.Model):
            pass = models.IntegerField() # 'pass' is a reserved word!
@@ -1221,7 +1223,9 @@ subclass with a :class:`~django.db.models.ManyToManyField`::
     class Supplier(Place):
         customers = models.ManyToManyField(Place)
 
-This results in the error::
+This results in the error:
+
+.. code-block:: pytb
 
     Reverse query name for 'Supplier.customers' clashes with reverse query
     name for 'Supplier.place_ptr'.

docs/topics/db/queries.txt

@@ -1067,7 +1067,7 @@ query for SQL ``NULL``, use :lookup:`isnull`:
     <Dog: Archie>
     >>> Dog.objects.filter(data=None)
     <QuerySet [<Dog: Archie>]>
-    >>> Dog.objects.filter(data=Value(None, JSONField())
+    >>> Dog.objects.filter(data=Value(None, JSONField()))
     <QuerySet [<Dog: Archie>]>
     >>> Dog.objects.filter(data__isnull=True)
     <QuerySet [<Dog: Max>]>
@@ -1356,7 +1356,9 @@ For example, this statement yields a single ``Q`` object that represents the
 
     Q(question__startswith='Who') | Q(question__startswith='What')
 
-This is equivalent to the following SQL ``WHERE`` clause::
+This is equivalent to the following SQL ``WHERE`` clause:
+
+.. code-block: sql
 
     WHERE question LIKE 'Who%' OR question LIKE 'What%'
 

docs/topics/db/sql.txt

@@ -309,7 +309,8 @@ alias::
 
     from django.db import connections
     with connections['my_db_alias'].cursor() as cursor:
-        # Your code here...
+        # Your code here
+        ...
 
 By default, the Python DB API will return results without their field names,
 which means you end up with a ``list`` of values, rather than a ``dict``. At a