no bug: suggested doc patch

[JT Williams]

--- 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
+
address@hidden
+foo
+foo
+bar
address@hidden example
+
address@hidden
+then the output of @command{uniq} is
+
address@hidden
+foo
+bar
address@hidden example
+
address@hidden
+but the output of @command{uniq -u} is
+
address@hidden
+bar
address@hidden example
 
 @item -w @var{n}
 @itemx address@hidden