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-rw-r--r--src/sort.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/sort.c b/src/sort.c
index 17c42633f..13304c751 100644
--- a/src/sort.c
+++ b/src/sort.c
@@ -291,6 +291,7 @@ Write sorted concatenation of all FILE(s) to standard output.\n\
\n\
Ordering options:\n\
\n\
+Mandatory arguments to long options are mandatory for short options too.\n\
-b, --ignore-leading-blanks ignore leading blanks\n\
-d, --dictionary-order consider only blanks and alphanumeric characters\n\
-f, --ignore-case fold lower case to upper case characters\n\