Echo notifications for wikitext pages do not differentiate between adding or deleting text. As a result, if a whole page is blanked - a user will receive 'A user left a message on your talk page' which is misleading.
However, 'View history' displays in sufficient details (the number of bytes added/deleted) which edits were made - the # of bytes added with '+' and deleted with '-' .
- Go to a wikitext user talk page and delete a chunk of text.
- The owner of a user talk page receives a notification that says that a message was left on the user talk page.
Note:
- Deleting flow topic or a post does not trigger messages. So, it's another discrepancy between wikitext notifications and flow notifications.
- Flow messages have a correct way to describe any edits - not implying that the text was added as in 'user left you a message'. Flow message will just state: e.g. "A post in "May26" was edited on your talk page."