reg --collapse-if-zero
<<<
2007/02/02 RD VMMXX
    Assets:Investments:Vanguard:VMMXX       $0.35
    Income:Dividends:Vanguard:VMMXX        $-0.35

2007/02/02 RD VMMXX
    Assets:Investments:Vanguard:VMMXX  0.350 VMMXX @ $1.00
    Income:Dividends:Vanguard:VMMXX        $-0.35
>>>1
07-Feb-02 RD VMMXX              As:In:Vanguard:VMMXX    0.350 VMMXX  0.350 VMMXX
                                In:Di:Vanguard:VMMXX         $-0.35       $-0.35
                                                                     0.350 VMMXX
>>>2
=== 0