wp-includes/feed.php:176Displays the post title in the feed.
function the_title_rss() { echo get_the_title_rss();}Introduced in 0.71. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/feed.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.