strange syntax - Mailing list pgsql-docs

The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/12/manage-ag-overview.html
Description:

this sentence looks strange:
"Schemas are a purely logical structure and who can access what is managed
by the privilege system"
https://www.postgresql.org/docs/12/manage-ag-overview.html

especially this part: "who can access what is managed by"