[4.2.x] Refs #34140 -- Applied rst code-block to non-Python examples.

Thanks to J.V. Zammit, Paolo Melchiorre, and Mariusz Felisiak for
reviews.

Backport of 534ac48297 from main.

docs/intro/contributing.txt

@@ -357,7 +357,9 @@ that's really what happens. ``cd`` to the Django ``tests/`` directory and run:
     $ ./runtests.py shortcuts
 
 If the tests ran correctly, you should see one failure corresponding to the test
-method we added, with this error::
+method we added, with this error:
+
+.. code-block:: pytb
 
     ImportError: cannot import name 'make_toast' from 'django.shortcuts'
 
@@ -407,7 +409,9 @@ Writing Documentation
 
 This is a new feature, so it should be documented. Open the file
 ``docs/topics/http/shortcuts.txt`` and add the following at the end of the
-file::
+file:
+
+.. code-block:: rst
 
     ``make_toast()``
     ================
@@ -421,7 +425,9 @@ file::
 Since this new feature will be in an upcoming release it is also added to the
 release notes for the next version of Django. Open the release notes for the
 latest version in ``docs/releases/``, which at time of writing is ``2.2.txt``.
-Add a note under the "Minor Features" header::
+Add a note under the "Minor Features" header:
+
+.. code-block:: rst
 
     :mod:`django.shortcuts`
     ~~~~~~~~~~~~~~~~~~~~~~~

docs/intro/install.txt

@@ -20,7 +20,9 @@ Get the latest version of Python at https://www.python.org/downloads/ or with
 your operating system's package manager.
 
 You can verify that Python is installed by typing ``python`` from your shell;
-you should see something like::
+you should see something like:
+
+.. code-block:: pycon
 
     Python 3.x.y
     [GCC 4.x] on linux

docs/intro/overview.txt

@@ -66,7 +66,9 @@ Enjoy the free API
 
 With that, you've got a free, and rich, :doc:`Python API </topics/db/queries>`
 to access your data. The API is created on the fly, no code generation
-necessary::
+necessary:
+
+.. code-block:: pycon
 
     # Import the models we created from our "news" app
     >>> from news.models import Article, Reporter

docs/intro/reusable-apps.txt

@@ -53,7 +53,9 @@ projects and ready to publish for others to install and use.
 Your project and your reusable app
 ==================================
 
-After the previous tutorials, our project should look like this::
+After the previous tutorials, our project should look like this:
+
+.. code-block:: text
 
     mysite/
         manage.py
@@ -256,9 +258,11 @@ this. For a small app like polls, this process isn't too difficult.
 
 #. It's optional, but recommended, to include detailed documentation with your
    app. Create an empty directory ``django-polls/docs`` for future
-   documentation. Add an additional line to ``django-polls/MANIFEST.in``::
+   documentation. Add an additional line to ``django-polls/MANIFEST.in``:
 
-    recursive-include docs *
+   .. code-block:: text
+
+      recursive-include docs *
 
    Note that the ``docs`` directory won't be included in your package unless
    you add some files to it. Many Django apps also provide their documentation
@@ -291,16 +295,20 @@ working. We'll now fix this by installing our new ``django-polls`` package.
    solution (see below).
 
 #. To install the package, use pip (you already :ref:`installed it
-   <installing-reusable-apps-prerequisites>`, right?)::
+   <installing-reusable-apps-prerequisites>`, right?):
 
-    python -m pip install --user django-polls/dist/django-polls-0.1.tar.gz
+   .. code-block:: shell
+
+      python -m pip install --user django-polls/dist/django-polls-0.1.tar.gz
 
 #. With luck, your Django project should now work correctly again. Run the
    server again to confirm this.
 
-#. To uninstall the package, use pip::
+#. To uninstall the package, use pip:
 
-    python -m pip uninstall django-polls
+   .. code-block:: shell
+
+      python -m pip uninstall django-polls
 
 Publishing your app
 ===================

docs/intro/tutorial01.txt

@@ -76,7 +76,9 @@ work, see :ref:`troubleshooting-django-admin`.
     Put your code in some directory **outside** of the document root, such as
     :file:`/home/mycode`.
 
-Let's look at what :djadmin:`startproject` created::
+Let's look at what :djadmin:`startproject` created:
+
+.. code-block:: text
 
     mysite/
         manage.py
@@ -224,7 +226,9 @@ and type this command:
 
     $ python manage.py startapp polls
 
-That'll create a directory :file:`polls`, which is laid out like this::
+That'll create a directory :file:`polls`, which is laid out like this:
+
+.. code-block:: text
 
     polls/
         __init__.py
@@ -257,7 +261,9 @@ This is the simplest view possible in Django. To call the view, we need to map
 it to a URL - and for this we need a URLconf.
 
 To create a URLconf in the polls directory, create a file called ``urls.py``.
-Your app directory should now look like::
+Your app directory should now look like:
+
+.. code-block:: text
 
     polls/
         __init__.py

docs/intro/tutorial02.txt

@@ -381,7 +381,9 @@ We're using this instead of simply typing "python", because :file:`manage.py`
 sets the :envvar:`DJANGO_SETTINGS_MODULE` environment variable, which gives
 Django the Python import path to your :file:`mysite/settings.py` file.
 
-Once you're in the shell, explore the :doc:`database API </topics/db/queries>`::
+Once you're in the shell, explore the :doc:`database API </topics/db/queries>`:
+
+.. code-block:: pycon
 
     >>> from polls.models import Choice, Question  # Import the model classes we just wrote.
 
@@ -468,7 +470,9 @@ you aren't familiar with time zone handling in Python, you can learn more in
 the :doc:`time zone support docs </topics/i18n/timezones>`.
 
 Save these changes and start a new Python interactive shell by running
-``python manage.py shell`` again::
+``python manage.py shell`` again:
+
+.. code-block:: pycon
 
     >>> from polls.models import Choice, Question
 

docs/intro/tutorial05.txt

@@ -206,7 +206,9 @@ In the terminal, we can run our test:
 
     $ python manage.py test polls
 
-and you'll see something like::
+and you'll see something like:
+
+.. code-block:: shell
 
     Creating test database for alias 'default'...
     System check identified no issues (0 silenced).
@@ -267,7 +269,9 @@ past:
         now = timezone.now()
         return now - datetime.timedelta(days=1) <= self.pub_date <= now
 
-and run the test again::
+and run the test again:
+
+.. code-block:: pytb
 
     Creating test database for alias 'default'...
     System check identified no issues (0 silenced).
@@ -376,13 +380,17 @@ it earlier, check it before continuing.
 
 Next we need to import the test client class (later in ``tests.py`` we will use
 the :class:`django.test.TestCase` class, which comes with its own client, so
-this won't be required)::
+this won't be required):
+
+.. code-block:: pycon
 
     >>> from django.test import Client
     >>> # create an instance of the client for our use
     >>> client = Client()
 
-With that ready, we can ask the client to do some work for us::
+With that ready, we can ask the client to do some work for us:
+
+.. code-block:: pycon
 
     >>> # get a response from '/'
     >>> response = client.get('/')