Someone

on *:text:!sets*:#:{
  if ($nick $isop $chan) || ($nick $ishop $chan) || ($nick $isvoice $chan) {
if (!$2) {
    if (%changed [ $+ [ $nick ] ] == $null) {
      msg $chan 12You haven't set any worlds yet! | Halt
    }
    elseif (%changed [ $+ [ $nick ] ] != $null) {
      msg $chan 4 $+ $nick 12has set4 %changed [ $+ [ $nick ] ] 12worlds | Halt 
    }
  }
  else {
    if (%changed [ $+ [ $2 ] ] == $null) {
      msg $chan 4 $+ $2 12hasnt set any worlds | Halt 
    }
    elseif (%changed [ $+ [ $2 ] ] != $null) {
      msg $chan 4 $+ $2 12has set4 %changed [ $+ [ $2 ] ] 12worlds 
    }
  }
}