### Summary

Writing this following #79967, which I created because I thought that I encountered a bug, but in fact I didn't know some details about how `argv` parameter works.

It would be great to have information provided to me there in the documentation in case anybody else encounter the same issues. Especially this comment was very helpful:
> precisely because you can use white space you need to separate what is not the same argument or the flag + argument are passed as a unit '--flag arg' vs '--flag' 'arg'

### Issue Type

Documentation Report

### Component Name

https://github.com/ansible/ansible/blob/devel/lib/ansible/modules/command.py

### Ansible Version

```console
$ ansible --version
```


### Configuration

```console
# if using a version older than ansible-core 2.12 you should omit the '-t all'
$ ansible-config dump --only-changed -t all
```


### OS / Environment

Linux

### Additional Information

When the improvement is applied, it makes it more straightforward to understand how argv parameters works

### Code of Conduct

- [X] I agree to follow the Ansible Code of Conduct
check_mode:
        details: while the command itself is arbitrary and cannot be subject to the check mode semantics it adds C(creates)/C(removes) options as a workaround
        support: partial
    diff_mode:
        support: none
    platform:
      support: full
      platforms: posix
    raw:
      support: full
options:
  expand_argument_vars:
    description:
      - Expands the arguments that are variables, for example C($HOME) will be expanded before being passed to the
        command to run.
      - Set to C(false) to disable expansion and treat the value as a literal argument.
    type: bool
    default: true
    version_added: "2.16"
  free_form:
    description:
      - The command module takes a free form string as a command to run.
      - There is no actual parameter named 'free form'.
  cmd:
    type: str
    description:
      - The command to run.
  argv:
    type: list
    elements: str