change extends <-> implements: ensure resulted list is formatted (IDEA-201751)

lists are created from light elements which are created from canonical texts and they just do not contain whitespaces

java/java-analysis-impl/src/com/intellij/codeInsight/daemon/impl/quickfix/ExtendsListFix.java

@@ -22,6 +22,7 @@ import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.editor.Editor;
 import com.intellij.openapi.project.Project;
 import com.intellij.psi.*;
+import com.intellij.psi.codeStyle.CodeStyleManager;
 import com.intellij.psi.codeStyle.JavaCodeStyleManager;
 import com.intellij.util.IncorrectOperationException;
 import org.jetbrains.annotations.NonNls;
@@ -147,6 +148,7 @@ public class ExtendsListFix extends LocalQuickFixAndIntentionActionOnPsiElement
       }
     }
     PsiReferenceList list = extendsList;
+    Project project = extendsList.getProject();
     if (add && !alreadyExtends) {
       PsiElement anchor;
       if (position == -1) {
@@ -158,8 +160,7 @@ public class ExtendsListFix extends LocalQuickFixAndIntentionActionOnPsiElement
       else {
         anchor = referenceElements[position - 1];
       }
-      PsiJavaCodeReferenceElement classReferenceElement =
-        JavaPsiFacade.getElementFactory(extendsList.getProject()).createReferenceElementByType(myTypeToExtendFrom);
+      PsiJavaCodeReferenceElement classReferenceElement = JavaPsiFacade.getElementFactory(project).createReferenceElementByType(myTypeToExtendFrom);
       PsiElement element;
       if (anchor == null) {
         if (referenceElements.length == 0) {
@@ -180,6 +181,6 @@ public class ExtendsListFix extends LocalQuickFixAndIntentionActionOnPsiElement
       return;
     }
 
-    JavaCodeStyleManager.getInstance(extendsList.getProject()).shortenClassReferences(list);
+    CodeStyleManager.getInstance(project).reformat(JavaCodeStyleManager.getInstance(project).shortenClassReferences(list));
   }
 }

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/changeExtendsToImplements/afterFormatting.java

@@ -0,0 +1,5 @@
+// "Change 'implements b' to 'extends b'" "true"
+class a extends b<String, Integer> {
+}
+
+class b<T, K> {}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/changeExtendsToImplements/beforeFormatting.java

@@ -0,0 +1,5 @@
+// "Change 'implements b' to 'extends b'" "true"
+class a implements <caret>b<String, Integer> {
+}
+
+class b<T, K> {}