Rst fixes (#79939)

* fix rstcheck errors for 6.1.1
* spell shell correctly

docs/docsite/rst/dev_guide/testing_units_modules.rst

@@ -388,8 +388,8 @@ Here is a simple mock of :meth:`AnsibleModule.run_command` (taken from :file:`te
 
         with patch.object(basic.AnsibleModule, 'run_command') as run_command:
             run_command.return_value = 0, '', ''  # successful execution, no output
-                with self.assertRaises(AnsibleExitJson) as result:
-                    my_module.main()
+            with self.assertRaises(AnsibleExitJson) as result:
+                my_module.main()
                 self.assertFalse(result.exception.args[0]['changed'])
         # Check that run_command has been called
         run_command.assert_called_once_with('/usr/bin/command args')

docs/docsite/rst/network/getting_started/first_playbook.rst

@@ -91,7 +91,7 @@ The playbook sets three of the seven values from the command line above: the gro
 
 The playbook contains one play with two tasks, and should generate output like this:
 
-.. code-block:: bash
+.. code-block:: shell
 
    $ ansible-playbook -i vyos.example.net, -u ansible -k -e ansible_network_os=vyos.vyos.vyos first_playbook.yml
 
@@ -115,7 +115,7 @@ The playbook contains one play with two tasks, and should generate output like t
 
 The extended first playbook has five tasks in a single play. Run it with the same command you used above. The output shows you the change Ansible made to the config:
 
-.. code-block:: bash
+.. code-block:: shell
 
    $ ansible-playbook -i vyos.example.net, -u ansible -k -e ansible_network_os=vyos.vyos.vyos first_playbook_ext.yml