renamed prog to begin and added basics for the manual

bin/pre.slime.expanded

@@ -24,7 +24,7 @@ ithe sequence as arguemens." (eval (pair fun seq)))
 (define (last seq) "Returns the (first) of the last (pair) of the given sequence." (first (end seq)))
 
 (define (extend seq elem) "Extends a list with the given element, by putting it in
-the (rest) of the last element of the sequence." (if (pair? seq) (prog (define e (end seq)) (mutate e (pair (first e) elem)) seq) elem))
+the (rest) of the last element of the sequence." (if (pair? seq) (begin (define e (end seq)) (mutate e (pair (first e) elem)) seq) elem))
 
 (define (append seq elem) "Appends an element to a sequence, by extendeing the list
 with (pair elem nil)." (extend seq (pair elem nil)))
@@ -39,7 +39,7 @@ with (pair elem nil)." (extend seq (pair elem nil)))
 by the key 'from' and ends with the number defined in 'to'." (if (< from to) ([C-function] (pair from (range :from (+ 1.000000 from) :to to))) nil))
 
 (define (range-while :keys from :defaults-to 0.000000 to) "Returns a sequence of numbers starting with the number defined
-by the key 'from' and ends with the number defined in 'to'." (define result (list (copy from))) (define head result) (mutate from (increment from)) (while (< from to) (prog (mutate head (pair (first head) (pair (copy from) nil))) (define head (rest head)) (mutate from (increment from)))) result)
+by the key 'from' and ends with the number defined in 'to'." (define result (list (copy from))) (define head result) (mutate from (increment from)) (while (< from to) (begin (mutate head (pair (first head) (pair (copy from) nil))) (define head (rest head)) (mutate from (increment from)))) result)
 
 (define (map fun seq) "Takes a function and a sequence as arguments and returns a new
 sequence which contains the results of using the first sequences
@@ -67,5 +67,5 @@ added to a list, which in the end is returned." (if seq ([C-function] (if (fun (
 " :rest args) "A wrapper for the built-in (print) that accepts a variable number
 of arguments and also provides keywords for specifying the printed
 separators between the arguments and what should be printed after the
-las argument." (define printf-quoted (special-lambda (:keys @sep @end :rest @args) (if (nil? @args) (prog (print (eval @end)) nil) (prog (print (first @args)) (if (nil? (rest @args)) nil ([C-function] (print (eval @sep)))) (eval (pair printf-quoted (extend (list :@sep (eval @sep) :@end (eval @end)) (rest @args)))))))) (eval (pair printf-quoted (extend (list :@sep (eval sep) :@end (eval end)) args))))
+las argument." (define printf-quoted (special-lambda (:keys @sep @end :rest @args) (if (nil? @args) (begin (print (eval @end)) nil) (begin (print (first @args)) (if (nil? (rest @args)) nil ([C-function] (print (eval @sep)))) (eval (pair printf-quoted (extend (list :@sep (eval @sep) :@end (eval @end)) (rest @args)))))))) (eval (pair printf-quoted (extend (list :@sep (eval sep) :@end (eval end)) args))))