Different placeholder for exactly the same string
|Reported by:||jiehanzheng||Owned by:||nacin|
Check your inbox at <strong>[$user_email]</strong> and click the link given.
is logically used twice in wp-signup.php. However, in the first occurrence, $user_email is referred to as "%1$s", whereas in the second occurrence, it is referred to as "%s". And this makes an extra POT translate template entry.