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Expected output for 'h5stat --help'
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Usage: h5stat [OPTIONS] file

      OPTIONS
     -h, --help            Print a usage message and exit
     -V, --version         Print version number and exit
     -f, --file            Print file information
     -F, --filemetadata    Print file space information for file's metadata
     -g, --group           Print group information
     -G, --groupmetadata   Print file space information for groups' metadata
     -d, --dset            Print dataset information
     -D, --dsetmetadata    Print file space information for datasets' metadata
     -T, --dtypemetadata   Print datasets' datatype information
     -A, --attribute       Print attribute information
     -s, --freespace       Print free space information
     -S, --summary         Print summary of file space information