extractionModel: cleanup code

idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/introduceTypeAlias/extractionModel.kt

@@ -1,17 +1,6 @@
 /*
- * Copyright 2010-2016 JetBrains s.r.o.
+ * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
- *
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
  */
 
 package org.jetbrains.kotlin.idea.refactoring.introduce.introduceTypeAlias
@@ -33,7 +22,7 @@ import org.jetbrains.kotlin.types.KotlinType
 
 class TypeReferenceInfo(val reference: KtTypeReference, val type: KotlinType)
 
-internal var KtTypeReference.resolveInfo : TypeReferenceInfo? by CopyablePsiUserDataProperty(Key.create("RESOLVE_INFO"))
+internal var KtTypeReference.resolveInfo: TypeReferenceInfo? by CopyablePsiUserDataProperty(Key.create("RESOLVE_INFO"))
 
 class IntroduceTypeAliasData(
     val originalTypeElement: KtElement,
@@ -52,9 +41,9 @@ class IntroduceTypeAliasData(
             override fun visitTypeReference(typeReference: KtTypeReference) {
                 val typeElement = typeReference.typeElement ?: return
 
-                val kotlinType = bindingContext[BindingContext.ABBREVIATED_TYPE, typeReference] ?:
+                val kotlinType = bindingContext[BindingContext.ABBREVIATED_TYPE, typeReference]
-                                 bindingContext[BindingContext.TYPE, typeReference] ?:
+                    ?: bindingContext[BindingContext.TYPE, typeReference]
-                                 return
+                    ?: return
                 typeReference.resolveInfo = TypeReferenceInfo(typeReference, kotlinType)
 
                 typeElement.typeArgumentsAsTypes.forEach { it?.accept(this) }