Add examples for `stdout` loops

These 2 methods are mentioned [here](https://docs.ansible.com/playbooks_conditionals.html), so I thought it'd make sense to have them in the repo too.

language_features/register_logic.yml

@@ -29,5 +29,15 @@
 
       - shell: echo "motd contains the word hi"
         when: motd_result.stdout.find('hi') != -1
+        
+      # you can use 'stdout_lines' to loop over the registered output lines
+      - name: motd lines mathing 'hi'
+        shell: echo "{{ item  }}"
+        with_items: motd_result.stdout_lines
+        
+      # you can also split 'stdout' yourself
+      - name: motd lines mathing 'hi'
+        shell: echo "{{ item  }}"
+        with_items: motd_result.stdout.split('\n')