Update app.py

app.py

@@ -79,7 +79,7 @@ if what == 'See examples':
         "2. Project development was proceeding too slowly.",
         "3. This brochure is particularly informative for a prospective buyer.",
         "4. I'd rather not buy these shoes than be overcharged.",
-        "5. Those musicians harmonize marvellously"
+        "5. Those musicians harmonize marvellously."
         )
     )