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##### SUMMARY
<!--- Explain the problem briefly below -->
Ansible currently contains two modules for managing AWS EC2 instances: [`ec2`](https://docs.ansible.com/ansible/latest/modules/ec2_module.html) and [`ec2_instance`](https://docs.ansible.com/ansible/latest/modules/ec2_instance_module.html).

There is considerable overlap between the modules, but it's unclear what the differences are and why there are two modules in the first place.

##### ISSUE TYPE
- Documentation Report

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->
ec2
ec2_instance

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```paste below
ansible 2.10.0.dev0
  config file = /home/user/.ansible.cfg
  configured module search path = ['/home/user/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /home/user/ansible/lib/ansible
  executable location = /home/user/ansible/bin/ansible
  python version = 3.7.5 (default, Oct 27 2019, 15:43:29) [GCC 9.2.1 20191022]
```

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

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

##### STEPS TO REPRODUCE
<!--- Describe exactly how to reproduce the problem, using a minimal test-case -->

<!--- Paste example playbooks or commands between quotes below -->
```yaml
N/A
```

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

##### EXPECTED RESULTS
<!--- Describe what you expected to happen when running the steps above -->
N/A

##### ACTUAL RESULTS
<!--- Describe what actually happened. If possible run with extra verbosity (-vvvv) -->

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

instance_ids = module.params.get('instance_ids')
        instance_tags = module.params.get('instance_tags')
        if not (isinstance(instance_ids, list) or isinstance(instance_tags, dict)):
            module.fail_json(msg='running list needs to be a list of instances or set of tags to run: %s' % instance_ids)
        (changed, instance_dict_array, new_instance_ids) = startstop_instances(module, ec2, instance_ids, state, instance_tags)
    elif state in ('restarted'):
        instance_ids = module.params.get('instance_ids')
        instance_tags = module.params.get('instance_tags')
        if not (isinstance(instance_ids, list) or isinstance(instance_tags, dict)):
            module.fail_json(msg='running list needs to be a list of instances or set of tags to run: %s' % instance_ids)
        (changed, instance_dict_array, new_instance_ids) = restart_instances(module, ec2, instance_ids, state, instance_tags)
    elif state == 'present':
        
        if not module.params.get('image'):
            module.fail_json(msg='image parameter is required for new instance')
        if module.params.get('exact_count') is None:
            (instance_dict_array, new_instance_ids, changed) = create_instances(module, ec2, vpc)
        else:
            (tagged_instances, instance_dict_array, new_instance_ids, changed) = enforce_count(module, ec2, vpc)
    
    if new_instance_ids:
        new_instance_ids.sort()
    if instance_dict_array:
        instance_dict_array.sort(key=lambda x: x['id'])
    if tagged_instances:
        tagged_instances.sort(key=lambda x: x['id'])
    module.exit_json(changed=changed, instance_ids=new_instance_ids, instances=instance_dict_array, tagged_instances=tagged_instances)
if __name__ == '__main__':
    main()