(usage): Say what happens with two or more arguments.

diff --git a/src/sleep.c b/src/sleep.c
index 8ff3b3b45260dd68d3dfae04ee8d0aeac65be58a..6ff81b8050291c59f7a016e8a272601ac2a44af5 100644 (file)
--- a/src/sleep.c
+++ b/src/sleep.c
@@ -51,7 +51,8 @@ Usage: %s NUMBER[SUFFIX]...\n\
 Pause for NUMBER seconds.  SUFFIX may be `s' for seconds (the default),\n\
 `m' for minutes, `h' for hours or `d' for days.  Unlike most implementations\n\
 that require NUMBER be an integer, here NUMBER may be an arbitrary floating\n\
-point number.\n\
+point number.  Given two or more arguments, pause for the amount of time\n\
+specified by the sum of their values.\n\
 \n\
 "),
              program_name, program_name);