pamstretch --version (return code: 0)
pamstretch: Using libpbm from Netpbm Version: Netpbm 10.0
pamstretch: BSD defined
pamstretch: RGB_ENV='RGBDEF'
pamstretch: RGBENV= 'RGBDEF' (env vbl is unset)
pamstretch -HELP (return code: 1)
pamstretch: Wrong number of arguments (0). Without scale options, you must supply 1 or 2 arguments: scale and optional file specification