Python: Better listing of project files in .pyproject file

Currently files in .pyproject are listed in single line. It's unreadable, when there are more files.

My suggestion is to list files in separate lines, with indentations.

Current state:

{
    "files": ["main.py","file1.py","file2.py"]
}

Suggestion:

{
    "files": [
        "main.py",
        "file1.py",
        "file2.py"
    ]
}