Apply suggestions from code review

Co-authored-by: Jelte Fennema-Nio <jelte.fennema@microsoft.com>

src/backend/distributed/commands/database.c

@@ -669,7 +669,7 @@ GenerateCreateDatabaseCommandList(void)
 
 		/* Generate the CREATE DATABASE statement */
 		appendStringInfo(outerDbStmt,
-						 "SELECT pg_catalog.citus_internal_database_command( %s)",
+						 "SELECT pg_catalog.citus_internal_database_command(%s)",
 						 quote_literal_cstr(
 							 createStmt));
 

src/backend/distributed/sql/udfs/citus_internal_database_command/latest.sql

@@ -5,6 +5,7 @@ CREATE OR REPLACE FUNCTION pg_catalog.citus_internal_database_command(command te
  RETURNS void
  LANGUAGE C
  VOLATILE
+ STRICT
 AS 'MODULE_PATHNAME', $$citus_internal_database_command$$;
 COMMENT ON FUNCTION pg_catalog.citus_internal_database_command(text) IS
  'run a database command without transaction block restrictions';