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##### SUMMARY
When ansible-pull creates the ansible command to pull the repo, assuming no additional command line arguments have been supplied, it constructs both an --inventory argument and a --limit argument.  The --inventory argument has only 'localhost,' while the --limit argument has 'localhost,<hostname>,127.0.0.1'.  This is guaranteed to produce the warning:
[WARNING]: Could not match supplied host pattern, ignoring: <hostname>

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
ansible-pull

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```paste below
ansible 2.9.7
  config file = /etc/ansible/ansible.cfg
  configured module search path = [u'/home/mwallace/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/dist-packages/ansible
  executable location = /usr/bin/ansible
  python version = 2.7.17 (default, Nov  7 2019, 10:07:09) [GCC 9.2.1 20191008]
```

##### CONFIGURATION
<!--- Paste verbatim output from "ansible-config dump --only-changed" between quotes -->
```paste below
DEPRECATION_WARNINGS(/etc/ansible/ansible.cfg) = False
```

##### OS / ENVIRONMENT
<!--- Provide all relevant information below, e.g. target OS versions, network device firmware, etc. -->
Linux ccm-lc-fin-304 5.3.0-46-generic #38-Ubuntu SMP Fri Mar 27 17:37:05 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

##### STEPS TO REPRODUCE
<!--- Describe exactly how to reproduce the problem, using a minimal test-case -->
sudo ansible-pull -U <git repo url>
<!--- Paste example playbooks or commands between quotes below -->
```yaml

```

<!--- HINT: You can paste gist.github.com links for larger files -->

##### EXPECTED RESULTS
<!--- Describe what you expected to happen when running the steps above -->
I expect this to run with no warnings

##### ACTUAL RESULTS
<!--- Describe what actually happened. If possible run with extra verbosity (-vvvv) -->
I get the warning:
[WARNING]: Could not match supplied host pattern, ignoring: <hostname>

<!--- Paste verbatim command output between quotes -->
```paste below

```

''' Used to pull a remote copy of ansible on each managed node,
        each set to run via cron and update playbook source via a source repository.
        This inverts the default *push* architecture of ansible into a *pull* architecture,
        which has near-limitless scaling potential.
        The setup playbook can be tuned to change the cron frequency, logging locations, and parameters to ansible-pull.
        This is useful both for extreme scale-out as well as periodic remediation.
        Usage of the 'fetch' module to retrieve logs from ansible-pull runs would be an
        excellent way to gather and analyze remote logs from ansible-pull.
    '''
    name = 'ansible-pull'
    DEFAULT_REPO_TYPE = 'git'
    DEFAULT_PLAYBOOK = 'local.yml'
    REPO_CHOICES = ('git', 'subversion', 'hg', 'bzr')
    PLAYBOOK_ERRORS = {
        1: 'File does not exist',
        2: 'File is not readable',
    }
    ARGUMENTS = {'playbook.yml': 'The name of one the YAML format files to run as an Ansible playbook.'
                                 'This can be a relative path within the checkout. By default, Ansible will'
                                 "look for a playbook based on the host's fully-qualified domain name,"
                                 'on the host hostname and finally a playbook named *local.yml*.', }
    SKIP_INVENTORY_DEFAULTS = True
    @staticmethod
    def _get_inv_cli():