edit online feature is the #1 enemy of TDD

Author: Yaskier

src/main/scala/stdlib/Lists.scala

@@ -159,7 +159,7 @@ object Lists extends FlatSpec with Matchers with org.scalaexercises.definitions.
     val a = (1 to 5).toList
     a should be(res0)
   }
-  
+
   /** You can prepend elements to a List to get a new List:
    */
   def addElementsLists(res0: List[Int]) {
@@ -170,17 +170,14 @@ object Lists extends FlatSpec with Matchers with org.scalaexercises.definitions.
 
   /** Lists can be concatened and Nil is an empty List:
    */
-  def concatenateLists(
-      res0: List[Int],
-      res1: List[Int]) {
+  def concatenateLists(res0: List[Int], res1: List[Int]) {
     val head = List(1, 3)
     val tail = List(5, 7)
 
     head ::: tail should be(res0)
     head ::: Nil should be(res1)
   }
 
-
   /** Lists reuse their tails:
    */
   def reuseTailsLists(

src/test/scala/stdlib/ListsSpec.scala

@@ -129,6 +129,24 @@ class ListsSpec extends Spec with Checkers {
     )
   }
 
+  def `add elements` = {
+    check(
+      Test.testSuccess(
+        Lists.addElementsLists _,
+        List(0, 1, 3, 5, 7) :: HNil
+      )
+    )
+  }
+
+  def `concatenate lists` = {
+    check(
+      Test.testSuccess(
+        Lists.concatenateLists _,
+        List(1, 3, 5, 7) :: List(1, 3) :: HNil
+      )
+    )
+  }
+
   def `lists share tails` = {
     check(
       Test.testSuccess(