# a commodity may contain/end with numbers, if double quoted
# 1. without quotes, fail. XXX parse error should be clearer here
bin/hledger -f- print
<<<
2010-04-05 x
   a   10 DE0002635307
   b
>>>2 /unexpected "0"/
>>>= 1
# 2. with quotes, ok; quotes appear in print output
bin/hledger -f- print
<<<
2010-04-05 x
   a   10 "DE 0002 635307"
   b
>>>
2010/04/05 x
    a  10 "DE 0002 635307"
    b  -10 "DE 0002 635307"

>>>=0

# 3. and in other reports too, I guess
bin/hledger -f- balance
<<<
2010-04-05 x
   a   10 "DE0002635307"
   b
>>>
   10 "DE0002635307"  a
  -10 "DE0002635307"  b
--------------------
                   0
>>>=0