Minor scheme changes

scmvm/language/scheme.scm

@@ -76,14 +76,14 @@
 (define (desugar-body body)
   (match body
     ['() '()]
-    [`(,e) (desugar-exp e)]
-    [`(. ,e*) `(begin ,@(map desugar-exp e*))]))
+    [(e) (desugar-exp e)]
+    [(e* ...) `(begin ,@(map desugar-exp e*))]))
 
 
 ;; A-Normalization
-;; All arguments to lambdas are atomic, all lets have 
 ;; <prgm> ::= <top> ...
 ;; <top>  ::= <def> | <exp>
+;; <def>  ::= (define <var> <exp>)
 ;; <exp>  ::= <aexp>
 ;;          | <cexp>
 ;;          | (let ((<var> <exp>)) <exp>)
@@ -93,6 +93,7 @@
 ;; <aexp> ::= (lambda (<var> ...) exp)
 ;;          | <num> | <var> | #t | #f
 ;; Atomic expressions are guaranteed to terminate without side effects or errors
+;; - All arguments to lambdas are atomic
 ;; - All complex (non-atomic) expressions are let-bound or in a tail position
 ;; - All let expressions bind a single var
 ;; - begin expressions are decomposed