tests: apply official code style

#KT-38632 Fixed

idea/testData/refactoring/introduceLambdaParameter/stringTemplates/rawTemplateWithSubstring.kt.after

@@ -1,7 +1,9 @@
-fun foo(a: Int, s: (Int) -> String = { a ->
-    """c$a
+fun foo(
+    a: Int, s: (Int) -> String = { a ->
+        """c$a
     :${a + 1}d"""
-}): String {
+    }
+): String {
     val x = """_${s(a)}_"""
     val y = "_$a:${a + 1}d_"
     val z = """_c$a:${a + 1}d_"""