lang/julia: operator highlights for ess-julia-mode

And adjust REPL handler to return the repl buffer.

modules/lang/julia/autoload.el

@@ -9,6 +9,5 @@
       (apply #'make-comint-in-buffer "Julia" "*Julia*" julia-program julia-arguments))
     (pop-to-buffer buffer)
     (with-current-buffer buffer
-      (inferior-julia-mode))))
-
-
+      (inferior-julia-mode))
+    buffer))

modules/lang/julia/config.el

@@ -7,8 +7,9 @@
 
   ;; Borrow matlab.el's fontification of math operators
   ;; From <https://ogbe.net/emacsconfig.html>
+  (dolist (mode '(julia-mode ess-julia-mode))
     (font-lock-add-keywords
-   'julia-mode
+     mode
      `((,(let ((OR "\\|"))
            (concat "\\(" ;; stolen `matlab.el' operators first
                    "[<>!]=?" OR
@@ -26,5 +27,4 @@
                    ;; comparison
                    "[<>!]=?" OR
                    "\\)"))
-      1 font-lock-type-face))))
-
+        1 font-lock-type-face)))))