Replace fly-make-mode with flymake-mode-except

I didn't want flymake-mode to automatically fire in emacs-lisp-mode.  I should
probably be better served by either (a) getting my Emacs config files up to
snuff or (b) adding a better test to decide whether to flymake them.

init.el

@@ -399,9 +399,16 @@
            show-paren-when-point-inside-paren t
            show-paren-when-point-in-periphery t)
 
+  (defun flymake-mode-except ()
+    "Turn on flymake mode, except in some modes."
+    (let ((no-flymake-modes '(emacs-lisp-mode)))
+      (unless (or (member major-mode no-flymake-modes)
+                  (apply #'derived-mode-p no-flymake-modes))
+        (flymake-mode-on))))
+  
   (:hook show-paren-mode
          electric-pair-local-mode
-         flymake-mode
+         flymake-mode-except
          acdw/setup-fringes)
 
   (add-hook 'after-save-hook