option '--append'
option '-a'
option '-b' with argument '5'
option '--block' with argument '10'
option '-c'
option '-c' with argument 'arg'
option '--casual'
option '--casual' with argument 'arg'
option '-e' with argument ''
option '-e' with argument 'arg'
option '--empty' with argument ''
option '--empty' with argument 'arg'
option '-H'
option '-o' with argument 'file'
option '--long-only'
option '-q'
option '--verbose'
non-option argument 'file1'
non-option argument 'file2'
