Shell manual

[Brandon Allbery]

Expires:

Quoted from <4230 at sun.uucp> ["Re: sh changes"], by shannon at sun.UUCP...
+---------------
| 	"If the colon (:) is omitted from the above expressions,
| 	the shell only checks whether parameter is set or not."
+---------------

Which I interpreted as:  without the colon, it becomes a no-op-or-error,
depending on whether it's set or not.  The manuals are less than unambiguous
in mnay places...

--Brandon
-- 
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