[docs] Minor docs fixes

Author: nemesifier

docs/developer/admin-utils.rst

@@ -65,7 +65,7 @@ creating filters for related multitenant models.
 
 Consider the following example from `IpAddressAdmin in openwisp-ipam
 <https://github.com/openwisp/openwisp-ipam/blob/956d9d25fc1ac339cb148ec7faf80046cc14be37/openwisp_ipam/admin.py#L216-L227>`_.
-``IpAddressAdmin`` allows filtering `IpAddress objects by ``Subnet``
+``IpAddressAdmin`` allows filtering ``IpAddress`` objects by ``Subnet``
 belonging to organizations managed by the user.
 
 .. code-block:: python

docs/developer/extending.rst

@@ -44,7 +44,7 @@ A Django app is nothing more than a `Python package
 of Python scripts). In the following examples, we'll call this Django app
 ``myusers``, but you can name it however you like:
 
-.. code-block::
+.. code-block:: bash
 
     django-admin startapp myusers
 
@@ -73,7 +73,7 @@ apps, please refer to the `Django documentation
 
 Install (and add to the requirements of your project) openwisp-users:
 
-.. code-block::
+.. code-block:: bash
 
     pip install openwisp-users
 
@@ -185,7 +185,7 @@ Substitute ``myusers`` with the name you chose in step 1.
 
 Create database migrations:
 
-.. code-block::
+.. code-block:: bash
 
     ./manage.py makemigrations
 
@@ -196,7 +196,7 @@ contents of the `sample_users/migrations/0004_default_groups.py
 
 Then, run the migrations:
 
-.. code-block::
+.. code-block:: bash
 
     ./manage.py migrate
 
@@ -361,7 +361,7 @@ to find out how to do this.
 
 You can then run tests with:
 
-.. code-block::
+.. code-block:: bash
 
     # the --parallel flag is optional
     ./manage.py test --parallel myusers

docs/developer/index.rst

@@ -8,7 +8,7 @@ Developer Docs
 
     ./installation.rst
     ./admin-utils.rst
-    ./django-rest-framework-utils
+    ./django-rest-framework-utils.rst
     ./misc-utils.rst
     ./extending.rst
 

docs/developer/misc-utils.rst

@@ -96,7 +96,7 @@ The cache is automatically invalidated on the following events:
 
 Usage example:
 
-.. code-block::
+.. code-block:: python
 
     >>> user.organizations_dict
     ... {'20135c30-d486-4d68-993f-322b8acb51c4': {'is_admin': True, 'is_owner': False}}
@@ -110,7 +110,7 @@ Returns a list of primary keys of organizations the user can manage.
 
 Usage example:
 
-.. code-block::
+.. code-block:: python
 
     >>> user.organizations_managed
     ... ['20135c30-d486-4d68-993f-322b8acb51c4']
@@ -122,7 +122,7 @@ Returns a list of primary keys of organizations the user owns.
 
 Usage example:
 
-.. code-block::
+.. code-block:: python
 
     >>> user.organizations_owned
     ... ['20135c30-d486-4d68-993f-322b8acb51c4']