Document auto-formatting feature

doc/user/project/static_site_editor/index.md

@@ -53,10 +53,15 @@ click of a button:
 
 ![Static Site Editor](img/wysiwyg_editor_v13_3.png)
 
-When an editor submits their changes, in the background, GitLab automatically
-creates a new branch, commits their changes, and opens a merge request. The
-editor lands directly on the merge request, and then they can assign it to
-a colleague for review.
+When an editor submits their changes, these are the following actions that GitLab
+performs automatically in the background:
+
+1. Creates a new branch.
+1. Commits their changes.
+   1. Fixes formatting according to the [Handbook Markdown Style Guide](https://about.gitlab.com/handbook/markdown-guide/) style guide and add them through another commit.
+1. Opens a merge request against the default branch.
+
+The editor can then navigate to the merge request to assign it to a colleague for review.
 
 ## Set up your project