no bug: suggested doc patch

--- textutils.texi.orig	2003-02-28 12:18:56.655077000 -0600
+++ textutils.texi	2003-02-28 12:26:36.432005000 -0600
@@ -2513,7 +2513,30 @@
 @opindex -u
 @opindex --unique
 @cindex unique lines, outputting
-Print only unique lines.
+Print only unique lines, i.e., print only those input lines
+that occur exactly once.
+For example, if the following lines are input
+
+@example
+foo
+foo
+bar
+@end example
+
+@noindent
+then the output of @command{uniq} is
+
+@example
+foo
+bar
+@end example
+
+@noindent
+but the output of @command{uniq -u} is
+
+@example
+bar
+@end example
 
 @item -w @var{n}
 @itemx --check-chars=@var{n}