Fix a UI typo which appear when using $config['site']['indent'] = null

Add whitespace after _('Repeated by') as it's done in showNoticeSource function

Typo only appear when minifying HTML and not in normal mode because of TAB inserted.

lib/noticelist.php

@@ -617,6 +617,7 @@ class NoticeListItem extends Widget
             $this->out->elementStart('span', 'repeat vcard');
 
             $this->out->raw(_('Repeated by'));
+            $this->out->raw(' ');
 
             $this->out->elementStart('a', $attrs);
             $this->out->element('span', 'fn nickname', $repeater->nickname);