fix spec with ; between commands, doesn't work on windows
fix spec with ; between commands, doesn't work on windows

mihailim/image_optim,ramiroaraujo/image_optim,toy/image_optim,toy/image_optim,mihailim/image_optim,toy/image_optim,mihailim/image_optim,ramiroaraujo/image_optim,ramiroaraujo/image_optim