Removed trailing newline characters in test cases for 'interface' and 'main' live templates.

idea/testData/templates/interface.exp.kt

@@ -1,3 +1,3 @@
 trait SomeTrait {
     <caret>
-}
+}

idea/testData/templates/main.exp.kt

@@ -1,3 +1,3 @@
 fun main(args : Array<String>) {
     <caret>
-}
+}