Fix electric-operator config so it works with the newest version

configuration.org

@@ -2041,7 +2041,7 @@ Automatically add spaces around operators.
   (add-hook 'c-mode-common-hook 'electric-operator-mode)
   ;; Apply electric-operator-mode to vala-mode, too
   (apply #'electric-operator-add-rules-for-mode 'vala-mode
-         electric-operator-prog-mode-rules))
+         (electric-operator-get-rules-for-mode 'prog-mode)))
 #+END_SRC
 
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