<!--- Verify first that your issue is not already reported on GitHub -->
<!--- Also test if the latest release and devel branch are affected too -->
<!--- Complete *all* sections as described, this form is processed automatically -->

##### 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
```

params['valid_until'] = utc_valid_until.strftime('%Y-%m-%dT%H:%M:%S.000Z')
                res = ec2.request_spot_instances(spot_price, **params)
                
                if wait:
                    instids = await_spot_requests(module, ec2, res, count)
                else:
                    instids = []
        except boto.exception.BotoServerError as e:
            module.fail_json(msg="Instance creation failed => %s: %s" % (e.error_code, e.error_message))
        
        num_running = 0
        wait_timeout = time.time() + wait_timeout
        res_list = ()
        while wait_timeout > time.time() and num_running < len(instids):
            try:
                res_list = ec2.get_all_instances(instids)
            except boto.exception.BotoServerError as e:
                if e.error_code == 'InvalidInstanceID.NotFound':
                    time.sleep(1)
                    continue
                else:
                    raise
            num_running = 0
            for res in res_list:
                num_running += len([i for i in res.instances if i.state == 'running'])
            if len(res_list) <= 0:
                
                
                time.sleep(1)
                continue