Merge pull request #340 from AY2425S1-CS2103T-F12-1/fix-pe-2-phrasing

Fix planned enhancement 2 phrasing

docs/DeveloperGuide.md

@@ -739,8 +739,7 @@ hence reducing the usefulness of this command.
 This limitation is due to our current system design which forces a role type to be assigned to an exact module code into the search query for the find command to execute,
 we plan to adopt other ways of constructing the query to allow for more general search of module-role in the future.
 
-2. **Allow deletion of other optional data fields of a contact, using the current edit command approach.** Currently, only the description and tag fields of a contact can be deleted, by editing the contact description field with
-an empty string (For Example: `edit 9 d/` removes description of the ninth contact in the current list), and not any other optional fields such as phone, email and address.
+2. **Allow deletion of other optional data fields of a contact, using the current edit command approach.** Currently, only the description and tag fields can be deleted, by specifying the corresponding prefix followed by an empty string (For Example: `edit 9 t/` removes all tags, while `edit 9 d/` removes the description of the ninth contact in the current list). However, other optional fields such as the phone, email and address cannot be removed as of v1.6.
 
 ![point2_screenshot_remove_description_example](images/Planned_Enhancements_Screenshots/Point2_RemoveDescriptionExample.png)
 (As shown in the screenshot, `edit 9 d/` successfully removes description field from the ninth person in the current list.)