reg --empty --collapse
<<<
2008/01/01 January
    Expenses:Books          $10.00
    Assets:Cash

2008/01/01 January
    Expenses:One:Books          $10.00
    Expenses:One:Two:Books          $10.00
    Expenses:One:Two:Three:Books          $10.00
    Assets:Cash

2008/01/01 January
    Assets:Cash    0
    Income:Books

2008/01/01 January
    Assets:Cash
    Income:One:Books          $-10.00
    Income:One:Two:Books          $-10.00
    Income:One:Two:Three:Books          $-10.00
>>>1
08-Jan-01 January               <Total>                           0            0
08-Jan-01 January               <Total>                           0            0
08-Jan-01 January               <Total>                           0            0
08-Jan-01 January               <Total>                           0            0
>>>2
=== 0