ocamlformat.el (ocamlformat-before-save): support caml-mode (#2433)

Author: nojb

emacs/ocamlformat.el

@@ -98,7 +98,7 @@ nil (default)."
 
 \(add-hook \\='before-save-hook \\='ocamlformat-before-save)."
   (interactive)
-  (when (eq major-mode 'tuareg-mode) (ocamlformat)))
+  (when (memq major-mode '(tuareg-mode caml-mode)) (ocamlformat)))
 
 (defun ocamlformat--goto-line (line)
   "Move point to the line numbered LINE."