The manual says:
"A few ancient 4.2BSD based systems (such as Dynix circa 1984) required a
single space between the `#!' and the `/'. However, these ancient systems
are no longer of practical concern."
This is probably not actually correct. See detailed debunking of this
apparent myth at:
http://www.in-ulm.de/~mascheck/various/shebang/
Since it's definitely irrelevant for users of autoconf (it seems pretty
clear that autoconf won't work on any such system even if it does exist) I
suggest you remove this paragraph from the documentation and leave the
matter for historians to argue.
--
http://rrt.sc3d.org/ | Slow Pedestrian Crossing (Anon)
