wp-includes/post-formats.php:194Filters the post format term link to remove the format prefix.
$linkstring$termWP_Term$taxonomystringstringfunction _post_format_link( $link, $term, $taxonomy ) { global $wp_rewrite; if ( 'post_format' !== $taxonomy ) { return $link; } if ( $wp_rewrite->get_extra_permastruct( $taxonomy ) ) { return str_replace( "/{$term->slug}", '/' . str_replace( 'post-format-', '', $term->slug ), $link ); } else { $link = remove_query_arg( 'post_format', $link ); return add_query_arg( 'post_format', str_replace( 'post-format-', '', $term->slug ), $link ); }}Introduced in 3.1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/post-formats.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.