Docs: Code-block wrapping for playbooks_startnstep.rst #75934 (#75943)

* Code-block wrapping for playbooks_startnstep.rst #75934
Co-authored-by: Abhijeet Kasurde <akasurde@redhat.com>

docs/docsite/rst/user_guide/playbooks_startnstep.rst

@@ -11,7 +11,9 @@ When you are testing new plays or debugging playbooks, you may need to run the s
 start-at-task
 -------------
 
-To start executing your playbook at a particular task (usually the task that failed on the previous run), use the ``--start-at-task`` option::
+To start executing your playbook at a particular task (usually the task that failed on the previous run), use the ``--start-at-task`` option.
+
+.. code-block:: shell
 
     ansible-playbook playbook.yml --start-at-task="install packages"
 
@@ -22,11 +24,15 @@ In this example, Ansible starts executing your playbook at a task named "install
 Step mode
 ---------
 
-To execute a playbook interactively, use ``--step``::
+To execute a playbook interactively, use ``--step``.
+
+.. code-block:: shell
 
     ansible-playbook playbook.yml --step
 
-With this option, Ansible stops on each task, and asks if it should execute that task. For example, if you have a task called "configure ssh", the playbook run will stop and ask::
+With this option, Ansible stops on each task, and asks if it should execute that task. For example, if you have a task called "configure ssh", the playbook run will stop and ask.
+
+.. code-block:: shell
 
     Perform task: configure ssh (y/n/c):