.dir-locals.el
((tuareg-mode .
((require-final-newline . t)
(c-basic-offset . 2)
(tab-width . 2)
(indent-tabs-mode . nil)
(eval . (add-hook 'write-contents-functions 'delete-trailing-whitespace)))))
(easycrypt-mode .
((require-final-newline . t)
(indent-tabs-mode . nil)))