doc/postgresql-test-hook: Add example

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doc/hooks/postgresql-test-hook.section.md
··· 40 40 41 41 Bash-only variables: 42 42 43 - - `postgresqlTestUserOptions`: SQL options to use when creating the `$PGUSER` role, default: `LOGIN`. 43 + - `postgresqlTestUserOptions`: SQL options to use when creating the `$PGUSER` role, default: `"LOGIN"`. Example: `"LOGIN SUPERUSER"` 44 44 - `postgresqlTestSetupSQL`: SQL commands to run as database administrator after startup, default: statements that create `$PGUSER` and `$PGDATABASE`. 45 45 - `postgresqlTestSetupCommands`: bash commands to run after database start, defaults to running `$postgresqlTestSetupSQL` as database administrator. 46 46 - `postgresqlEnableTCP`: set to `1` to enable TCP listening. Flaky; not recommended.