Colapse a lot of strings to make like easier for translators and more consisitant for users

darcs-hash:20080713053748-533db-1cdb0cf3a9e4102eb139b74a7a9d4f97dadb20b8.gz

actions/allrss.php

@@ -32,7 +32,7 @@ class AllrssAction extends Rss10Action {
 		$this->user = User::staticGet('nickname', $nickname);
 
 		if (!$this->user) {
-			common_user_error(_('No such nickname.'));
+			common_user_error(_('No such user.'));
 			return false;
 		} else {
 			return true;