From mboxrd@z Thu Jan  1 00:00:00 1970
From: doug@cs.dartmouth.edu (Doug McIlroy)
Date: Wed, 18 Oct 2017 19:03:05 -0400
Subject: [TUHS] basic tools / Universal Unix
Message-ID: <201710182303.v9IN35Bv030527@coolidge.cs.Dartmouth.EDU>

>       sed *n l pathname
>
>   The latter also has the advantage that its output is

>   unambiguous, whereas the output of historical cat *etv is not.
>
> But mind you, in preparation of this email i found a bug in
> Busybox sed(1) which simply echoes nothing for the above.

I assume that * is a typo for - . If so, sed did just what
-n tells it to--no printing except as called for by p or P.

And speaking of sed anticipating other tools, the inclusion
of "head" in v7 as a complement to "tail" was a close call
because head is subsumed by sed q.

Doug