![ross](/assets/img/avatar_default.png)
D1 (dee-one) has two bogus-looking lines that are not in Dl (dee-ell); and what they do is delete the first parameter unless it is a callable macro. This may have something to do with the reason why dee-ell is used 418 times in /usr/share/man vs only 6 times for the crippled dee-one.