Hygiene of #define DIR \"/usr/lib/news

[MLY.G.SHADES%MIT-OZ at MIT-MC.ARPA]

	re arthur olson's <ad0 at elsie.uucp> msg about open ended
string macros.  this is non-portable and in direct contravention of
the definition of what the pre-processor is supposed to do.

	the pre-processor is supposed to work with tokens only.  half
of a string is not a full token.  this should generate an error
message not concatenate two half strings.

                      shades%mit-oz at mit-mc.arpa