#############################
Expected output for 'hdiff -d -t 2 hdifftst1.hdf hdifftst2.hdf'
#############################
position        dset1           dset1           difference          
------------------------------------------------------------
[ 1 1 ]          1               4               3              
position        dset2           dset2           difference          
------------------------------------------------------------
[ 1 1 ]          1               4               3