diff --git a/langs/dupe/ast.rkt b/langs/dupe/ast.rkt
index 50183b13..11f58818 100644
--- a/langs/dupe/ast.rkt
+++ b/langs/dupe/ast.rkt
@@ -1,16 +1,13 @@
 #lang racket
 (provide Lit Prim1 If)
-
 ;; type Expr = (Lit Datum)
 ;;           | (Prim1 Op1 Expr)
 ;;           | (If Expr Expr Expr)
-
 ;; type Datum = Integer
 ;;            | Boolean
-
 ;; type Op1 = 'add1 | 'sub1
 ;;          | 'zero?
-
 (struct Lit (d) #:prefab)
 (struct Prim1 (p e) #:prefab)
 (struct If (e1 e2 e3) #:prefab)
+
diff --git a/langs/dupe/compile.rkt b/langs/dupe/compile.rkt
index fa817ac1..3a39225c 100644
--- a/langs/dupe/compile.rkt
+++ b/langs/dupe/compile.rkt
@@ -8,7 +8,7 @@
 (define rax 'rax)
 
 ;; Expr -> Asm
-(define (compile e)  
+(define (compile e)
   (prog (Global 'entry)
         (Label 'entry)
         (compile-e e)
@@ -17,8 +17,8 @@
 ;; Expr -> Asm
 (define (compile-e e)
   (match e
-    [(Lit d)         (compile-value d)]
-    [(Prim1 p e)     (compile-prim1 p e)]
+    [(Lit d) (compile-value d)]
+    [(Prim1 p e) (compile-prim1 p e)]
     [(If e1 e2 e3)
      (compile-if e1 e2 e3)]))
 
diff --git a/langs/dupe/interp-prim.rkt b/langs/dupe/interp-prim.rkt
index e0ea0720..09116bb7 100644
--- a/langs/dupe/interp-prim.rkt
+++ b/langs/dupe/interp-prim.rkt
@@ -7,3 +7,4 @@
     ['add1 (add1 v)]
     ['sub1 (sub1 v)]
     ['zero? (zero? v)]))
+
diff --git a/langs/dupe/interp.rkt b/langs/dupe/interp.rkt
index 920f0920..ade09931 100644
--- a/langs/dupe/interp.rkt
+++ b/langs/dupe/interp.rkt
@@ -6,7 +6,6 @@
 ;; type Value =
 ;; | Integer
 ;; | Boolean
-
 ;; Expr -> Value
 (define (interp e)
   (match e
@@ -17,3 +16,4 @@
      (if (interp e1)
          (interp e2)
          (interp e3))]))
+
diff --git a/langs/dupe/parse.rkt b/langs/dupe/parse.rkt
index 673a0266..e67d3135 100644
--- a/langs/dupe/parse.rkt
+++ b/langs/dupe/parse.rkt
@@ -11,6 +11,7 @@
      (If (parse e1) (parse e2) (parse e3))]
     [_ (error "Parse error")]))
 
+
 ;; Any -> Boolean
 (define (datum? x)
   (or (exact-integer? x)
diff --git a/langs/dupe/run.rkt b/langs/dupe/run.rkt
index 227703c1..37cba759 100644
--- a/langs/dupe/run.rkt
+++ b/langs/dupe/run.rkt
@@ -1,7 +1,8 @@
 #lang racket
 (require a86/interp)
 (require "types.rkt")
-(provide run);; Asm -> Value
+(provide run)
+;; Asm -> Value
 (define (run is)
   (bits->value (asm-interp is)))
 
diff --git a/langs/dupe/test/interp.rkt b/langs/dupe/test/interp.rkt
index 41aa8c04..dc33c12a 100644
--- a/langs/dupe/test/interp.rkt
+++ b/langs/dupe/test/interp.rkt
@@ -2,6 +2,6 @@
 (require "../interp.rkt")
 (require "../parse.rkt")
 (require "test-runner.rkt")
- 
+
 (test (λ (e) (interp (parse e))))
 
diff --git a/langs/dupe/test/test-runner.rkt b/langs/dupe/test/test-runner.rkt
index 7dcac9f1..650b1313 100644
--- a/langs/dupe/test/test-runner.rkt
+++ b/langs/dupe/test/test-runner.rkt
@@ -36,4 +36,3 @@
     (check-equal? (run '(zero? 4)) #f)
     (check-equal? (run '(zero? 0)) #t)))
 
-