The 'edit' string in lang/en_us/moodle.php in the en_us language pack seems to be incorrect. The manifestation of this problem can be seen in the user listing (as administrator). The column header for 'Edit' looks like this: 'Edit {$a}' This is happening in 2.2.15 (upgraded from earlier versions), even after performing "Update all installed language packs" in the Languages area.
Workaround is to customize the language pack, either manually or via Language Customization within Totara. I changed the string in lang/en_us/moodle.php at line 483:
$string['edit'] = 'Edit {$a}';
to
$string['edit'] = 'Edit';
I'm curious if others have seen this problem or if this might be a bug.
Jamie