sql_fullname() should respect the system or language settings

Manual test Login as admin Navigate to Users > Permissions > User policies in site administration Set Alternative full name format to the following: firstname middlename lastname Create a new user: First name: David Middle name: Charlie Surname: Carrot Create a second user: First name: David Middle name: Richard Last name: Lettuce Create a new course Enrol both users on course as students On the course participants page, use the filters Match: Any Keyword David Charlie Hit return Press Apply filters Confirm "David Charlie Carrot" test user matches the filter Confirm "David Richard Lettuce" test user does not match the filter Automated tests $ vendor/bin/phpunit --testsuite core_user_testsuite --filter '(test_keywords_filter|test_get_sql_fullname)'