Fix formatting in some of test data files.

Adapted from https://github.com/develar/kotlin/commit/a9e0a42fb1347fa8e21c86b5a073ef8a7c873da0.

js/js.translator/testFiles/trait/cases/traitExtendsTwoTraits.kt

@@ -1,25 +1,25 @@
 package foo
 
 trait A {
-    fun addFoo(s:String) : String {
-       return s + "FOO"
+    fun addFoo(s: String): String {
+        return s + "FOO"
     }
 }
 
 trait B {
-    fun hooray() : String {
+    fun hooray(): String {
         return "hooray"
     }
 }
 
-trait AD : A, B {
+trait AD: A, B {
 
 }
 
-class Test() : AD {
-    fun eval() : String {
+class Test(): AD {
+    fun eval(): String {
         return addFoo(hooray());
     }
 }
 
-fun box() = (Test().eval() == "hoorayFOO")
+fun box() = (Test().eval() == "hoorayFOO")