Trailing commas in "command" syntax?

[xigoi]

IMHO, commas are the semicolons of Nim/Python. If statements can be separated 
with a line break, why not other things? It's annoying in situations like this:
    
    
    const nested = {
      "things": [
        "foo",
        "bar",
      ],
      "stuff": [
        "baz",
        "quux",
      ],
    }
    
    
    Run