-- input --
2024-01-01 (123) groceries
    expenses:food  $10.00
    assets:checking
-- expect --
Journal
  Transaction j:1:1-4:1
    Date: 2024-01-01
    Code: "123" j:1:12-1:17
    Payee: "groceries" j:1:18-2:0
    Posting j:2:1-3:1
      Account j:2:5-2:18
        SubAccount: "expenses" j:2:5-2:13
        SubAccount: "food" j:2:14-2:18
      Amount j:2:20-3:0
        Quantity: 10
        Commodity: "$" j:2:20-2:21
        CommodityPos: Before
        HasSpace: false
        Precision: 2
        Decimal: "."
    Posting j:3:1-4:1
      Account j:3:5-4:0
        SubAccount: "assets" j:3:5-3:11
        SubAccount: "checking" j:3:12-4:0
      Amount: <elided>