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authorJim Meyering <jim@meyering.net>1999-01-10 22:06:15 +0000
committerJim Meyering <jim@meyering.net>1999-01-10 22:06:15 +0000
commit8d598fb33d338fc09a26e083bbb26c7287e06349 (patch)
treeca4f7f852fe5de845546f2976b4e1b58ce956f87 /doc
parentceb02a40aac06d77ce8461008938d2c4c8d01939 (diff)
downloadcoreutils-8d598fb33d338fc09a26e083bbb26c7287e06349.tar.xz
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-rw-r--r--doc/textutils.texi1
1 files changed, 1 insertions, 0 deletions
diff --git a/doc/textutils.texi b/doc/textutils.texi
index dbb8393ac..032f2bdfb 100644
--- a/doc/textutils.texi
+++ b/doc/textutils.texi
@@ -2337,6 +2337,7 @@ Print only duplicate lines.
Print all duplicate lines and only duplicate lines.
This option is useful mainly in conjunction with other options e.g.,
to ignore case or to compare only selected fields.
+This is a GNU extension.
@c FIXME: give an example showing *how* it's useful
@item -u