diff(1) command options

[Paul Goyette <paul%whooppee.com@localhost>]

Is there any _good_ reason that the various output-format options (-y, -u, -c, 
--normal, etc.) generate error messages if you specify more than one format? 
For example,

	# diff -u -y F1 F2
	diff: conflicting output style options
	diff: Try `diff --help' for more information.
	#

Most other utilities I can think of simply use the-last-specified option in a 
conflict set;  in the above example, -y would "override" -u.

In my case, I have a shell alias for

	alias diff "diff -u"

'cuz most of the time I want a -u output.  But once in a blue moon (or perhaps 
once in a blue+super moon) I want a -y (side-by-side) output; it's a real pain 
to have to bypass the alias by specifying a complete path to /usr/bin/diff

:)




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