do snippet insertion in one UndoGroup

src/AddIns/Misc/SharpRefactoring/Project/Src/OverrideEqualsGetHashCodeMethodsRefactoring.cs

@@ -46,6 +46,7 @@ namespace SharpRefactoring
 			if (current == null)
 				return;
 			
+			using (textEditor.Document.OpenUndoGroup()) {
 				ITextAnchor startAnchor = textEditor.Document.CreateAnchor(textEditor.Caret.Offset);
 				startAnchor.MovementType = AnchorMovementType.BeforeInsertion;
 				
@@ -74,6 +75,7 @@ namespace SharpRefactoring
 				insertionContext.RegisterActiveElement(new InlineRefactorSnippetElement(cxt => null, ""), dialog);
 				insertionContext.RaiseInsertionCompleted(EventArgs.Empty);
 			}
+		}
 		
 		public bool Handles(ICompletionItem item)
 		{

src/AddIns/Misc/SharpRefactoring/Project/Src/OverrideToStringMethodRefactoring.cs

@@ -46,6 +46,7 @@ namespace SharpRefactoring
 			if (current == null)
 				return;
 			
+			using (textEditor.Document.OpenUndoGroup()) {
 				ITextAnchor endAnchor = textEditor.Document.CreateAnchor(textEditor.Caret.Offset);
 				endAnchor.MovementType = AnchorMovementType.AfterInsertion;
 				
@@ -66,7 +67,7 @@ namespace SharpRefactoring
 				
 				InsertionContext insertionContext = new InsertionContext(textEditor.GetService(typeof(TextArea)) as TextArea, startAnchor.Offset);
 				
-			AbstractInlineRefactorDialog dialog = new OverrideToStringMethodDialog(insertionContext, textEditor, startAnchor, insertionPos, current.Fields);
+				AbstractInlineRefactorDialog dialog = new OverrideToStringMethodDialog(insertionContext, textEditor, startAnchor, insertionPos, current.Fields, codeForBaseCall.Trim());
 				dialog.Element = uiService.CreateInlineUIElement(insertionPos, dialog);
 				
 				textEditor.Document.InsertNormalized(endAnchor.Offset, Environment.NewLine + code.Substring(marker + codeForBaseCall.Length));
@@ -74,6 +75,7 @@ namespace SharpRefactoring
 				insertionContext.RegisterActiveElement(new InlineRefactorSnippetElement(cxt => null, ""), dialog);
 				insertionContext.RaiseInsertionCompleted(EventArgs.Empty);
 			}
+		}
 		
 		public bool Handles(ICompletionItem item)
 		{