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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

```

display.display("Repository has not changed, quitting.")
            return 0
        playbook = self.select_playbook(context.CLIARGS['dest'])
        if playbook is None:
            raise AnsibleOptionsError("Could not find a playbook to run.")
        
        cmd = '%s/ansible-playbook %s %s' % (bin_path, base_opts, playbook)
        if context.CLIARGS['vault_password_files']:
            for vault_password_file in context.CLIARGS['vault_password_files']:
                cmd += " --vault-password-file=%s" % vault_password_file
        if context.CLIARGS['vault_ids']:
            for vault_id in context.CLIARGS['vault_ids']:
                cmd += " --vault-id=%s" % vault_id
        for ev in context.CLIARGS['extra_vars']:
            cmd += ' -e %s' % shlex.quote(ev)
        if context.CLIARGS['become_ask_pass']:
            cmd += ' --ask-become-pass'
        if context.CLIARGS['skip_tags']:
            cmd += ' --skip-tags "%s"' % to_native(u','.join(context.CLIARGS['skip_tags']))
        if context.CLIARGS['tags']:
            cmd += ' -t "%s"' % to_native(u','.join(context.CLIARGS['tags']))
        if context.CLIARGS['subset']:
            cmd += ' -l "%s"' % context.CLIARGS['subset']
        else:
            cmd += ' -l "%s"' % limit_opts
        if context.CLIARGS['check']:
            cmd += ' -C'
        if context.CLIARGS['diff']:
            cmd += ' -D'
        os.chdir(context.CLIARGS['dest'])