Fix tests: "infix modifier required" and "operator modifier required" errors

compiler/testData/codegen/box/controlStructures/emptyFor.kt

@@ -1,7 +1,7 @@
 var index = 0
 
 interface IterableIterator : Iterator<Int> {
-    fun iterator(): Iterator<Int> = this
+    operator fun iterator(): Iterator<Int> = this
 }
 
 val iterator = object : IterableIterator {

compiler/testData/codegen/box/controlStructures/forLoopMemberExtensionAll.kt

@@ -6,9 +6,9 @@ class C {
 
 class X {
     var hasNext = true
-    fun It.hasNext() = if (hasNext) {hasNext = false; true} else false
-    fun It.next() = 5
-    fun C.iterator(): It = It()
+    operator fun It.hasNext() = if (hasNext) {hasNext = false; true} else false
+    operator fun It.next() = 5
+    operator fun C.iterator(): It = It()
 
     fun test() {
         for (i in C()) {

compiler/testData/codegen/box/controlStructures/forLoopMemberExtensionHasNext.kt

@@ -1,14 +1,14 @@
 class It {
-    fun next() = 5
+    operator fun next() = 5
 }
 
 class C {
-    fun iterator(): It = It()
+    operator fun iterator(): It = It()
 }
 
 class X {
     var hasNext = true
-    fun It.hasNext() = if (hasNext) {hasNext = false; true} else false
+    operator fun It.hasNext() = if (hasNext) {hasNext = false; true} else false
 
     fun test() {
         for (i in C()) {

compiler/testData/codegen/box/controlStructures/forLoopMemberExtensionNext.kt

@@ -1,14 +1,14 @@
 class It {
     var hasNext = true
-    fun hasNext() = if (hasNext) {hasNext = false; true} else false
+    operator fun hasNext() = if (hasNext) {hasNext = false; true} else false
 }
 
 class C {
-    fun iterator(): It = It()
+    operator fun iterator(): It = It()
 }
 
 class X {
-    fun It.next() = 5
+    operator fun It.next() = 5
 
     fun test() {
         for (i in C()) {

compiler/testData/codegen/box/controlStructures/forUserType.kt

@@ -92,23 +92,23 @@ class MyCollection2(): Iterable<Int> {
 }
 
 class MyCollection3() {
-    fun iterator() = MyIterator()
+    operator fun iterator() = MyIterator()
 
     class MyIterator() {
         var k : Int = 5
 
-        fun next() : Int? = k--
-        fun hasNext() : Boolean = k > 0
+        operator fun next() : Int? = k--
+        operator fun hasNext() : Boolean = k > 0
     }
 }
 
 class MyCollection4() {
-    fun iterator() = MyIterator()
+    operator fun iterator() = MyIterator()
 
     class MyIterator() {
         var k : Int = 5
 
-        fun next() : Int = k--
-        fun hasNext() = k > 0
+        operator fun next() : Int = k--
+        operator fun hasNext() = k > 0
     }
 }

compiler/testData/codegen/box/controlStructures/inRangeConditionsInWhen.kt

@@ -1,4 +1,4 @@
-fun Int.contains(i : Int) = true
+operator fun Int.contains(i : Int) = true
 
 fun box(): String {
     when (1) {

compiler/testData/codegen/box/controlStructures/kt299.kt

@@ -7,7 +7,7 @@ class MyRange1() : Range<Int> {
 }
 
 class MyRange2() {
-    fun contains(item: Int) = true
+    operator fun contains(item: Int) = true
 }
 
 fun box(): String {

compiler/testData/codegen/box/controlStructures/kt513.kt

@@ -1,7 +1,7 @@
 import java.util.*
 
 class A() {
-    fun <T> ArrayList<T>.add3(el: T) = add(el)
+    infix fun <T> ArrayList<T>.add3(el: T) = add(el)
 
     fun test(list: ArrayList<Int>) {
         for (i in 1..10) {
@@ -10,12 +10,12 @@ class A() {
     }
 }
 
-fun <T> ArrayList<T>.add2(el: T) = add(el)
+infix fun <T> ArrayList<T>.add2(el: T) = add(el)
 
 fun box() : String{
     var list = ArrayList<Int>()
     for (i in 1..10) {
-      list add  i
+      list.add(i)
       list add2 i
     }
     A().test(list)

compiler/testData/codegen/box/controlStructures/kt628.kt

@@ -1,7 +1,7 @@
 class A() {
   fun action() = "OK"
 
-  fun infix(a: String) = "O" + a
+  infix fun infix(a: String) = "O" + a
 
   val property = "OK"