# Pastebin 5oSGYBBC
has_field 'text' => (
    type     => 'Text',
    trim => { transform => sub {
        my $string = shift;
        # Not trimming starting spaces to avoid breaking list formatting,
        # consider trimming again once this uses Markdown 
        $string =~ s/\s+$//;
        return $string;
    } }
);