Extract Superclass/Interface/Pull Up: Reformat modifier lists of generated declarations (to add spaces where needed)

#KT-15639 Fixed

idea/testData/refactoring/extractSuperclass/reformatModifierList.kt

@@ -0,0 +1,8 @@
+// NAME: A
+annotation class Concat
+
+// SIBLING:
+class <caret>Abstraction {
+    // INFO: {"checked": "true", "toAbstract": "true"}
+    @Concat var extraction = 0
+}

idea/testData/refactoring/extractSuperclass/reformatModifierList.kt.after

@@ -0,0 +1,13 @@
+// NAME: A
+annotation class Concat
+
+abstract class A {
+    // INFO: {"checked": "true", "toAbstract": "true"}
+    @Concat abstract var extraction: Int
+}
+
+// SIBLING:
+class Abstraction : A() {
+    // INFO: {"checked": "true", "toAbstract": "true"}
+    @Concat override var extraction = 0
+}