DOCUMENTATION:
  name: splitext
  author: Matt Martz (@sivel)
  version_added: "2.0"
  short_description: split a path into root and file extension
  positional: _input
  description:
    - Returns a list of two, with the elements consisting of filename root and extension.
  options:
    _input:
      description: A path.
      type: str
      required: true

EXAMPLES: |

  # gobble => [ '/etc/make', '.conf' ]
  gobble: "{{ '/etc/make.conf' | splitext }}"

  # file_n_ext => [ 'ansible', '.cfg' ]
  file_n_ext: "{{ 'ansible.cfg' | splitext }}"

  # hoax => [ '/etc/hoasdf', '' ]
  hoax: "{{ '/etc/hoasdf' | splitext }}"

RETURN:
  _value:
    description: A list consisting of root of the path and the extension.
    type: list
    elements: str