Update app.py

app.py

@@ -157,8 +157,7 @@ class NoteSection:
         if self.contents[title].strip():
             self.placeholders[title].markdown(f"## {title}\n{self.contents[title]}")
 
-    def
- return_existing_contents(self, level=1) -> str:
+    def return_existing_contents(self, level=1) -> str:
         existing_content = ""
         for title, content in self.structure.items():
             if self.contents[title].strip():