Found the solution
function html_widget_title( $title ) {
$title = str_replace( '[br]', '<br/>', $title );
return $title;
}
add_filter( 'the_title', 'html_widget_title' );
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This reply was modified 3 years, 11 months ago by almador.
Why does it doubles the size for Retina if the original file is already in the same dimensions? Does it possible to disable generating this one Retina-ready files?