mal: modify lib/ in order to hide bugs in make/ and guile/

Make: avoid # character.
Guile: avoid `unquote` inside a vector inside a list inside `quasiquote`.
The bug in scheme/ is most probably the same.

lib/perf.mal

@@ -7,8 +7,8 @@
   (fn* (exp)
     (let* [start (gensym)
            ret   (gensym)]
-      `(let* [~start (time-ms)
-              ~ret    ~exp]
+      `(let* (~start (time-ms)
+              ~ret   ~exp)
         (do
           (prn (str "Elapsed time: " (- (time-ms) ~start) " msecs"))
           ~ret)))))

lib/test_cascade.mal

@@ -16,7 +16,7 @@
   (if (< (count xs) 2)
     (first xs)
     (let* [r (gensym)]
-      `(let* [~r ~(first xs)] (if ~r ~r (or ~@(rest xs))))))))
+      `(let* (~r ~(first xs)) (if ~r ~r (or ~@(rest xs))))))))
 
 ;; Conjonction of predicate values (pred x1) and .. and (pred xn)
 ;; Evaluate `pred x` for each `x` in turn. Return `false` if a result

lib/trivial.mal

@@ -12,8 +12,8 @@
 ;; Returns the unchanged argument.
 (def! identity (fn* (x) x))
 
-;; Generate a hopefully unique symbol.
-;; http://www.gigamonkeys.com/book/macros-defining-your-own.html#plugging-the-leaks
+;; Generate a hopefully unique symbol. See section "Plugging the Leaks"
+;; of http://www.gigamonkeys.com/book/macros-defining-your-own.html
 (def! gensym
   (let* [counter (atom 0)]
     (fn* []