defconst to defcustom

Author: sheganinans

haskell-font-lock.el

@@ -38,7 +38,7 @@ alignment and can thus lead to nasty surprises w.r.t layout."
   :group 'haskell
   :type 'boolean)
 
-(defconst haskell-font-lock-symbols-alist
+(defcustom haskell-font-lock-symbols-alist
   '(("\\" . "λ")
     ("not" . "¬")
     ("->" . "→")