Comments-RSS uses html-entities in translated text

[schlafbaum]

If the translation of eg. "Comments on: %s", used in feed-rss2-coments.php and feed-atom-comments.php, uses special chars like ü for ü, the comments feed will not alidate because of "Undefined named entity".

Solution: wrapping translation in html_entity_decode like:
feed-rss2-comments.php, line 21:
instead of:
printf(__('Comments on: %s', ENT_QUOTES, get_option('blog_charset')));

do:
printf(html_entity_decode(__('Comments on: %s', ENT_QUOTES, get_option('blog_charset')), get_the_title_rss());

Translated text is used in 5 lines in both mentioned files.

sorry, already in 8405

#8405