Refactor code in "simplify call chain" (relates to KT-28576)

idea/testData/inspectionsLocal/collections/simplifiableCallChain/joinToStringViaBuilder.kt.after

@@ -1,7 +1,7 @@
 // WITH_RUNTIME
 
 val x = listOf(1, 2, 3).joinToString(prefix = "= ", separator = " + ") {
-    val sb = StringBuilder()
-    sb.append(it).append(" + ").append(it)
-    sb
+val sb = StringBuilder()
+sb.append(it).append(" + ").append(it)
+sb
 }

idea/testData/inspectionsLocal/coroutines/deferredIsResult/complex.kt.after

@@ -8,9 +8,9 @@ suspend fun myFunction(context: CoroutineContext, switch: Int): Int {
     with (GlobalScope) {
         when (switch) {
             0 -> return withContext(Dispatchers.Default) {
-            val x = 123
-            x * x
-        }
+                val x = 123
+                x * x
+            }
             1 -> return withContext(context) { -1 }
             else -> return withContext(Dispatchers.Default) { 9 }
         }