Add missing format for same file extraction. It was removed from...

Add missing format for same file extraction. It was removed from GetSolutionWithOriginalTypeUpdatedAsync

src/Features/Core/Portable/ExtractInterface/AbstractExtractInterfaceService.cs

@@ -242,12 +242,17 @@ public async Task<ExtractInterfaceResult> ExtractInterfaceFromAnalyzedTypeAsync(
             var unformattedSolution = document.WithSyntaxRoot(editor.GetChangedRoot()).Project.Solution;
 
             // After the interface is inserted, update the original type to show it implements the new interface
-            var completedSolution = await GetSolutionWithOriginalTypeUpdatedAsync(
+            var unformattedSolutionWithUpdatedType = await GetSolutionWithOriginalTypeUpdatedAsync(
                 unformattedSolution, symbolMapping.DocumentIds,
                 refactoringResult.DocumentToExtractFrom.Id, symbolMapping.TypeNodeAnnotation,
                 refactoringResult.TypeToExtractFrom, extractedInterfaceSymbol,
                 extractInterfaceOptions.IncludedMembers, symbolMapping.SymbolToDeclarationAnnotationMap, cancellationToken).ConfigureAwait(false);
 
+            var completedSolution = await GetFormattedSolutionAsync(
+                unformattedSolutionWithUpdatedType, 
+                symbolMapping.DocumentIds.Concat(refactoringResult.DocumentToExtractFrom.Id), 
+                cancellationToken).ConfigureAwait(false);
+
             return new ExtractInterfaceResult(
                 succeeded: true,
                 updatedSolution: completedSolution,