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pow -> expt

--- a/builtins.c

+++ b/builtins.c

@@ -470,4 +470,4 @@

 		return mk_double(cname(todouble(args[0]), todouble(args[1]))); \

 	}

-BUILTIN_("pow", pow)

+BUILTIN_("expt", pow)

--- a/test/test.lsp

+++ b/test/test.lsp

@@ -61,19 +61,6 @@

 (define-macro (labl name fn)

   `((λ (,name) (set! ,name ,fn)) ()))

-(define (square x) (* x x))

-(define (expt b p)

-  (cond ((= p 0) 1)

-        ((= b 0) 0)

-        ((even? p) (square (expt b (div0 p 2))))

-        (#t (* b (expt b (- p 1))))))

-

-(define (gcd a b)

-  (cond ((= a 0) b)

-        ((= b 0) a)

-        ((< a b)  (gcd a (- b a)))

-        (#t       (gcd b (- a b)))))

-

 ; like eval-when-compile

 (define-macro (literal expr)

   (let ((v (eval expr)))