'Ensure correct Dock order' task seems to not work

[geerlingguy]

See error:

TASK [Ensure correct Dock order.] **************************************************************************************
fatal: [127.0.0.1]: FAILED! => 
  msg: |-
    The conditional check 'item.pos length >0' failed. The error was: template error while templating string: expected token 'end of statement block', got 'length'. String: {% if item.pos length >0 %} True {% else %} False {% endif %}
  
    The error appears to be in '/Users/jgeerling/Downloads/mac-dev-playbook/tasks/dock.yml': line 17, column 3, but may
    be elsewhere in the file depending on the exact syntax problem.
  
    The offending line appears to be:
  
  
    - name: Ensure correct Dock order.
      ^ here

[geerlingguy]

Current:

- item.pos length > 0

Should be:

- item.pos > 0