### Summary

It would be helpful if the generic `Unknown DOCUMENTATION error` indicated which of the documentation blocks was being parsed the the time the exception was hit.

### Issue Type

Feature Idea

### Component Name

ansible-test

### Additional Information

Locally I run `ansible-test sanity --docker default -vv` using the devel branch to try and keep ahead of new sanity tests (I know this is expected to break from time to time, and I'm good with that).

I hit the following error:
```
ERROR: plugins/modules/ec2_snapshot_info.py:0:0: documentation-error: Unknown DOCUMENTATION error, see TRACE: while scanning a simple key
  in "<unicode string>", line 72, column 13
could not find expected ':'
  in "<unicode string>", line 73, column 13
```

Because I hadn't changed this module it took me some time to figure out where the failure was occurring, being able to narrow down which of the documentation blocks had some bad YAML would have saved me time.  This is especially the case for these documentation tests because the line numbers aren't easy to trace.

### Code of Conduct

- [X] I agree to follow the Ansible Code of Conduct
"""
    Quickly find short_description using string methods instead of node parsing.
    This does not return a full set of documentation strings and is intended for
    operations like ansible-doc -l.
    """
    in_documentation = False
    capturing = False
    indent_detection = ''
    doc_stub = []
    with open(filename, 'r') as t_module_data:
        for line in t_module_data:
            if in_documentation:
                
                if capturing and line.startswith(indent_detection):
                    doc_stub.append(line)
                elif capturing and not line.startswith(indent_detection):
                    break
                elif line.lstrip().startswith('short_description:'):
                    capturing = True
                    
                    
                    indent_detection = ' ' * (len(line) - len(line.lstrip()) + 1)
                    doc_stub.append(line)
            elif line.startswith('DOCUMENTATION') and ('=' in line or ':' in line):
                in_documentation = True
    short_description = r''.join(doc_stub).strip().rstrip('.')
    data = AnsibleLoader(short_description, file_name=filename).get_single_data()
    return data