# let's have print preserve comments as far as possible
# we preserve line-end comments but not full line comments
bin/hledger -f - print
<<<
2009/1/1 x  ; description comment
    a  1  ; amount comment
    ; middle posting comment
    b
    ; trailing posting comment
; post-entry comment
>>>
2009/01/01 x  ; description comment
    a             1  ; amount comment
    b            -1

>>>=0