#############################
Expected output for 'hdiff -d -e 2 hdifftst1.hdf hdifftst2.hdf'
#############################
position        dset1           dset1           difference          
------------------------------------------------------------
[ 0 1 ]          1               2               1              
[ 1 0 ]          1               3               2              
position        dset2           dset2           difference          
------------------------------------------------------------
[ 0 1 ]          1               2               1              
[ 1 0 ]          1               3               2