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

[Arthur David Olson]

The 2.11 vnews source posted lately had a thought-provoking way of doing
string catenation.  It had defines such as

	#define DIR "/usr/lib/news

and used these defines in lines such as

	system(DIR/batch");

which, after being run through the 4.1bsd C preprocessor, yields

	system("/usr/lib/news/batch");

I'm wondering what folks think of the hygiene and portability of this
technique for accomplishing string catenation.  Let me know.
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