Change Signature: Retain formatting of existing parameters when parameter count/order changes

#KT-6412 Fixed

idea/testData/refactoring/changeSignature/ExpressionFunctionAfter.kt

@@ -1 +1 @@
-fun fun1(x1: Int, y1: Int): Int = x1 * 2 + fun1(x1, )
+fun fun1(x1: Int, y1: Int) : Int = x1 * 2 + fun1(x1, )

idea/testData/refactoring/changeSignature/NoDefaultValuesInOverridesAfter.kt

@@ -1,15 +1,18 @@
 trait T {
-    fun foo(a: Int = 1, b: String = "2")
+    fun foo(a: Int = 1,
+            b: String = "2")
 }
 
 open class A: T {
-    override fun foo(a: Int, b: String) {
+    override fun foo(a: Int,
+                     b: String) {
         throw UnsupportedOperationException()
     }
 }
 
 class B: A() {
-    override fun foo(a: Int, b: String) {
+    override fun foo(a: Int,
+                     b: String) {
         throw UnsupportedOperationException()
     }
 }

idea/testData/refactoring/changeSignature/ParameterListAddParamAfter.kt

@@ -0,0 +1,6 @@
+fun foo(
+        n: Int, s: String,
+        a: Any, l: Long
+) {
+
+}

idea/testData/refactoring/changeSignature/ParameterListAddParamBefore.kt

@@ -0,0 +1,6 @@
+fun <caret>foo(
+        n: Int, s: String,
+        a: Any
+) {
+
+}

idea/testData/refactoring/changeSignature/ParameterListRemoveAllParamsAfter.kt

@@ -0,0 +1,3 @@
+fun foo() {
+
+}

idea/testData/refactoring/changeSignature/ParameterListRemoveAllParamsBefore.kt

@@ -0,0 +1,6 @@
+fun <caret>foo(
+        n: Int, s: String,
+        a: Any
+) {
+
+}

idea/testData/refactoring/changeSignature/ParameterListRemoveParamAfter.kt

@@ -0,0 +1,5 @@
+fun <caret>foo(
+        n: Int, s: String
+) {
+
+}

idea/testData/refactoring/changeSignature/ParameterListRemoveParamBefore.kt

@@ -0,0 +1,6 @@
+fun <caret>foo(
+        n: Int, s: String,
+        a: Any
+) {
+
+}