#107375 follow up by zeta-zoo: fixed incorrect description for MySQL's 'Select_range_check'

modules/system/system.admin.inc

@@ -1774,7 +1774,7 @@ function system_sql() {
   $output .= '<h2>'. t('Query performance') .'</h2>';
   $output .= _system_sql($data, array(
    'Select_full_join' => t('The number of joins without an index; should be zero.'),
-   'Select_range_check' => t('The number of joins without an index; should be zero.'),
+   'Select_range_check' => t('The number of joins without keys that check for key usage after each row; should be zero.'),
    'Sort_scan' => t('The number of sorts done without using an index; should be zero.'),
    'Table_locks_immediate' => t('The number of times a lock could be acquired immediately.'),
    'Table_locks_waited' => t('The number of times the server had to wait for a lock.')