wp-includes/build/pages/font-library/page.php:310Intercept admin_init to render the page early.
function wp_font_library_intercept_render() { // phpcs:ignore WordPress.Security.NonceVerification.Recommended if ( isset( $_GET['page'] ) && 'font-library' === $_GET['page'] ) { wp_font_library_render_page(); exit; }}Unchanged from 7.0.4 through 7.1.0.
Signature, return type and hooks compared across 2 parsed releases.
src/wp-includes/build/pages/font-library/page.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.