Create From Usage: Fix rendering of nullable types

idea/testData/quickfix/createFromUsage/createVariable/property/afterValWithNullableType.kt

@@ -0,0 +1,11 @@
+// "Create property 'foo' from usage" "true"
+// ERROR: Property must be initialized or be abstract
+
+class A<T>(val n: T) {
+    val foo: A<T>?
+
+}
+
+fun test() {
+    val a: A<Int>? = A(1).foo
+}

idea/testData/quickfix/createFromUsage/createVariable/property/beforeValWithNullableType.kt

@@ -0,0 +1,8 @@
+// "Create property 'foo' from usage" "true"
+// ERROR: Property must be initialized or be abstract
+
+class A<T>(val n: T)
+
+fun test() {
+    val a: A<Int>? = A(1).<caret>foo
+}