The C-shell "nice" command doesn't work properly on its own.

[stephen at dcl-cs.UUCP]

Index:	bin/csh 4.2

Description:
	The "nice" command, with no arguments, sets the priority of the C-shell
	to 19 instead of 4.

Repeat-By:
	From the C-shell, type "nice" then "ps lt".  The NICE field says "19".
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