gvcolor --version (return code: 0)
gvcolor: option -- unrecognized - ignored
gvcolor: option -v unrecognized - ignored
gvcolor: option -e unrecognized - ignored
gvcolor: option -r unrecognized - ignored
gvcolor: option -s unrecognized - ignored
gvcolor: option -i unrecognized - ignored
gvcolor: option -o unrecognized - ignored
gvcolor: option -n unrecognized - ignored
gvcolor --help (return code: 0)
gvcolor: option -- unrecognized - ignored
gvcolor: option -h unrecognized - ignored
gvcolor: option -e unrecognized - ignored
gvcolor: option -l unrecognized - ignored
gvcolor: option -p unrecognized - ignored