Replace with string.Empty

Author: IvenBach

Rubberduck.Core/UI/ToDoItems/ToDoExplorerViewModel.cs

@@ -257,7 +257,7 @@ public void ExecuteCopyResultsCommand(object obj)
 
             var title = string.Format(resource, DateTime.Now.ToString(CultureInfo.InvariantCulture), _items.Count);
 
-            var textResults = title + Environment.NewLine + string.Join("", _items.OfType<IExportable>().Select(result => result.ToClipboardString() + Environment.NewLine).ToArray());
+            var textResults = title + Environment.NewLine + string.Join(string.Empty, _items.OfType<IExportable>().Select(result => result.ToClipboardString() + Environment.NewLine).ToArray());
             var csvResults = ExportFormatter.Csv(resultArray, title, columnInfos);
             var htmlResults = ExportFormatter.HtmlClipboardFragment(resultArray, title, columnInfos);
             var rtfResults = ExportFormatter.RTF(resultArray, title);