Update NoteBookmark.Domain/ReadingNotes.cs

Co-authored-by: Copilot <[email protected]>

Author: fboucher

NoteBookmark.Domain/ReadingNotes.cs

@@ -71,7 +71,7 @@ public string ToMarkDown()
         md.Append(Title + Environment.NewLine);
         md.Append('=', Title.Length);
 
-        md.Append(Environment.NewLine + Environment.NewLine + this.Intro ?? "" + Environment.NewLine);
+        md.Append(Environment.NewLine + Environment.NewLine + (this.Intro ?? "") + Environment.NewLine);
 
         //== All Notes
         foreach (var key in this.Notes.Keys)