Document that in range the first number must be less than second.

diff --git a/man/crontab.5 b/man/crontab.5
index 4052047267506207338a44f7531552b1b8cbc5de..a011c896524d034776ea7d25768ae465f52d1fa9 100644 (file)
--- a/man/crontab.5
+++ b/man/crontab.5
@@ -196,7 +196,8 @@ A field may contain an asterisk (*), which always stands for
 .PP
 Ranges of numbers are allowed.  Ranges are two numbers separated with a
 hyphen.  The specified range is inclusive.  For example, 8-11 for
-an 'hours' entry specifies execution at hours 8, 9, 10, and 11.
+an 'hours' entry specifies execution at hours 8, 9, 10, and 11. The first
+number must be less than or equal to the second one.
 .PP
 Lists are allowed.  A list is a set of numbers (or ranges) separated by
 commas.  Examples: "1,2,5,9", "0-4,8-12".