<!--- Verify first that your issue is not already reported on GitHub -->
<!--- Also test if the latest release and devel branch are affected too -->
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##### SUMMARY
<!--- Explain the problem briefly below -->
Pacman module throws "get_name: fail to retrieve package name from pacman output" for packages that have been already installed. This error completely prevents execution of playbooks.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->
Pacman

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```paste below
ansible 2.9.0
  config file = /etc/ansible/ansible.cfg
  configured module search path = ['/home/tomek/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python3.7/site-packages/ansible
  executable location = /usr/bin/ansible
  python version = 3.7.4 (default, Oct  4 2019, 06:57:26) [GCC 9.2.0]
```

##### CONFIGURATION
<!--- Paste verbatim output from "ansible-config dump --only-changed" between quotes -->
```paste below

```

##### OS / ENVIRONMENT
<!--- Provide all relevant information below, e.g. target OS versions, network device firmware, etc. -->
Arch Linux

##### STEPS TO REPRODUCE
<!--- Describe exactly how to reproduce the problem, using a minimal test-case -->
Execute any playbook on the Arch Linux OS with using Pacman module for package that has been installed previously.

<!--- 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 -->
Pacman module shouldn't throw an error and break execution of playbook.

##### ACTUAL RESULTS
<!--- Describe what actually happened. If possible run with extra verbosity (-vvvv) -->
Pacman module throws an error and breaks execution of playbook.

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

```

cmdupgrade = "%s --sync --sysupgrade --quiet --noconfirm %s" % (pacman_path, module.params["upgrade_extra_args"])
    cmdneedrefresh = "%s --query --upgrades" % (pacman_path)
    rc, stdout, stderr = module.run_command(cmdneedrefresh, check_rc=False)
    data = stdout.split('\n')
    data.remove('')
    packages = []
    diff = {
        'before': '',
        'after': '',
    }
    if rc == 0:
        
        
        
        regex = re.compile(r'([\w+\-.@]+) (\S+-\S+) -> (\S+-\S+)')
        for p in data:
            m = regex.search(p)
            packages.append(m.group(1))
            if module._diff:
                diff['before'] += "%s-%s\n" % (m.group(1), m.group(2))
                diff['after'] += "%s-%s\n" % (m.group(1), m.group(3))
        if module.check_mode:
            module.exit_json(changed=True, msg="%s package(s) would be upgraded" % (len(data)), packages=packages, diff=diff)
        rc, stdout, stderr = module.run_command(cmdupgrade, check_rc=False)
        if rc == 0:
            module.exit_json(changed=True, msg='System upgraded', packages=packages, diff=diff)
        else:
            module.fail_json(msg="Could not upgrade")
    else:
        module.exit_json(changed=False, msg='Nothing to upgrade', packages=packages)