fix typo

src/main/clojure/clojure/core/memoize.clj

@@ -264,7 +264,7 @@
 (defn build-memoizer
   "Builds a function that, given a function, returns a pluggable memoized
    version of it.  `build-memoizer` takes a cache factory function, and the
-   argunments to that factory function -- at least one of those arguments
+   arguments to that factory function -- at least one of those arguments
    should be the function to be memoized (it's usually the first argument).
 
   `memoizer` above is a simpler version of `build-memoizer` that 'does the