teach 'create from usage' to add 'operator' modifier when necessary

idea/testData/quickfix/createFromUsage/createFunction/binaryOperations/greaterOrEqualOnUserType.kt.after

@@ -1,7 +1,7 @@
 // "Create member function 'compareTo'" "true"
 
 class A<T>(val n: T) {
-    fun compareTo(t: T): Int {
+    operator fun compareTo(t: T): Int {
         throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 }

idea/testData/quickfix/createFromUsage/createFunction/binaryOperations/inOnUserType.kt.after

@@ -1,7 +1,7 @@
 // "Create member function 'contains'" "true"
 
 class A<T>(val n: T) {
-    fun contains(t: T): Boolean {
+    operator fun contains(t: T): Boolean {
         throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 }

idea/testData/quickfix/createFromUsage/createFunction/binaryOperations/lessOnUserType.kt.after

@@ -1,7 +1,7 @@
 // "Create member function 'compareTo'" "true"
 
 class A<T>(val n: T) {
-    fun compareTo(t: T): Int {
+    operator fun compareTo(t: T): Int {
         throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 }

idea/testData/quickfix/createFromUsage/createFunction/binaryOperations/notInOnUserType.kt.after

@@ -1,7 +1,7 @@
 // "Create member function 'contains'" "true"
 
 class A<T>(val n: T) {
-    fun contains(t: T): Boolean {
+    operator fun contains(t: T): Boolean {
         throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 }

idea/testData/quickfix/createFromUsage/createFunction/binaryOperations/plusAssignOnUserType.kt.after

@@ -1,7 +1,7 @@
 // "Create member function 'plusAssign'" "true"
 
 class A<T>(val n: T) {
-    fun plusAssign(t: T) {
+    operator fun plusAssign(t: T) {
         throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 }

idea/testData/quickfix/createFromUsage/createFunction/binaryOperations/plusExtraArgs.kt.after

@@ -3,7 +3,7 @@
 class A<T>(val n: T) {
     fun plus(): A<T> = throw Exception()
 
-    fun plus(t: T): A<T> {
+    operator fun plus(t: T): A<T> {
         throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 }

idea/testData/quickfix/createFromUsage/createFunction/binaryOperations/plusForAssignmentOnUserType.kt.after

@@ -1,7 +1,7 @@
 // "Create member function 'plus'" "true"
 
 class A<T>(val n: T) {
-    fun plus(t: T): A<T> {
+    operator fun plus(t: T): A<T> {
         throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 }

idea/testData/quickfix/createFromUsage/createFunction/binaryOperations/plusMissingArgs.kt.after

@@ -3,7 +3,7 @@
 class A<T>(val n: T) {
     fun plus(i: Int, s: String): A<T> = throw Exception()
 
-    fun plus(t: T): A<T> {
+    operator fun plus(t: T): A<T> {
         throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 }

idea/testData/quickfix/createFromUsage/createFunction/binaryOperations/plusOnLibType.kt.after

@@ -6,6 +6,6 @@ fun test() {
     val a: A<Int> = 2 + A(1)
 }
 
-fun Int.plus(a: A<Int>): A<Int> {
+operator fun Int.plus(a: A<Int>): A<Int> {
     throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
 }

idea/testData/quickfix/createFromUsage/createFunction/binaryOperations/plusOnUserType.kt.after

@@ -1,7 +1,7 @@
 // "Create member function 'plus'" "true"
 
 class A<T>(val n: T) {
-    fun plus(t: T): A<T> {
+    operator fun plus(t: T): A<T> {
         throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 }

idea/testData/quickfix/createFromUsage/createFunction/binaryOperations/plusOnUserTypeWithTypeParams.kt.after

@@ -1,7 +1,7 @@
 // "Create member function 'plus'" "true"
 
 class A<T>(val n: T) {
-    fun plus(i: Int): A<T> {
+    operator fun plus(i: Int): A<T> {
         throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 }

idea/testData/quickfix/createFromUsage/createFunction/binaryOperations/whenInOnUserType.kt.after

@@ -1,7 +1,7 @@
 // "Create member function 'contains'" "true"
 
 class A<T>(val n: T) {
-    fun contains(t: T): Boolean {
+    operator fun contains(t: T): Boolean {
         throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 }

idea/testData/quickfix/createFromUsage/createFunction/binaryOperations/whenNotInOnUserType.kt.after

@@ -1,7 +1,7 @@
 // "Create member function 'contains'" "true"
 
 class A<T>(val n: T) {
-    fun contains(t: T): Boolean {
+    operator fun contains(t: T): Boolean {
         throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 }