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-rw-r--r--toys/sleep.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/toys/sleep.c b/toys/sleep.c
index 1426690f..84de7ac2 100644
--- a/toys/sleep.c
+++ b/toys/sleep.c
@@ -1,6 +1,8 @@
/* vi: set sw=4 ts=4: */
/*
* sleep.c - Wait for a number of seconds.
+ *
+ * See http://www.opengroup.org/onlinepubs/007904975/utilities/sleep.html
*/
#include "toys.h"