meta-m runs delete-trailing-whitespace in curl-mode

  ;; keybindings for C, C++, and Objective-C.  We can put these in

  ;; c-mode-base-map because of inheritance ...

  (define-key c-mode-base-map "\M-q" 'c-fill-paragraph)

  (define-key c-mode-base-map "\M-m" 'delete-trailing-whitespace)

  (setq c-recognize-knr-p nil)

  ;;; (add-hook 'write-file-hooks 'delete-trailing-whitespace t)

  (setq show-trailing-whitespace t)