minor improvements

src/Assignment7/Ex3.sc

@@ -3,9 +3,9 @@ def addStream(s1: LazyList[Int], s2: LazyList[Int]): LazyList[Int] = {
 }
 
 def fibonacci(): LazyList[Int] = {
-  0 #:: addStream(
-    1 #:: fibonacci(),
-    fibonacci()
+  0 #:: 1 #:: addStream(
+    fibonacci(),
+    fibonacci().tail
   )
 }