This already seems to be covered by [Why can people edit my posts? How does editing work?][1]

> **When should I edit posts?**
>
> Any time you see a post that needs improvement and are inclined to suggest an edit, you are welcome to do so. The original author of a question or answer may always edit their own post, regardless of reputation level.
>
> Edits are expected to be substantial and to leave the post better than you found it. Common reasons for edits include:
>
> * To fix grammar and spelling mistakes
> * To clarify the meaning of the post (without changing that meaning)
> * To include additional information only found in comments, so all of the information relevant to the post is contained in one place
> * To correct minor mistakes or add updates as the post ages
> * To add related resources or hyperlinks


[1]: https://blender.stackexchange.com/help/editing