FSLeyes should return exit code 1 on bad command line arguments
>> fsleyes -q
FSLeyes version 0.10.1
Usage: fsleyes [options] file [displayOpts] file [displayOpts] ...
fsleyes: error: unrecognized arguments: -q
>> echo $?
0
>> fsleyes -q
FSLeyes version 0.10.1
Usage: fsleyes [options] file [displayOpts] file [displayOpts] ...
fsleyes: error: unrecognized arguments: -q
>> echo $?
0