Browsing through other docs (e,g.
https://www.postgresql.org/docs/devel/sql-createtable.html ) there doesn't seem to be a rule for that but if there is a single bracket (e.g. CREATE TABLE distributors), the options that follow usually start at position one and are not indented (or they
follow directly after the bracket).
Attached a small patch which makes it looking a bit better, at least in my opinion.