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Expected output for 'h5diff file1.h5 file2.h5 -p 0.21 -p 0.22 g1/dset3 g1/dset4'
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$h5diff file1.h5 file2.h5 -p 0.21 -p 0.22 g1/dset3 g1/dset4
position        dset3           dset4           difference      relative       
------------------------------------------------------------------------
[ 2 0 ]          100             140             40              0.4           
[ 2 1 ]          100             200             100             1