<p><?php printf( _n( '<strong>Version %1$s</strong> addressed %2$s bug.',
'<strong>Version %1$s</strong> addressed %2$s bugs.', 12 ), '4.5.1', number_format_i18n( 12 ) ); ?>
<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_4.5.1' ); ?>
</p>
<p><?php printf( _n( '<strong>Version %1$s</strong> addressed %2$s bug.',
'<strong>Version %1$s</strong> addressed %2$s bugs.', 12 ), '4.5.1', number_format_i18n( 12 ) ); ?>
<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_4.5.1' ); ?>
</p>