update deprecation comments

args.go

@@ -76,12 +76,17 @@ func RangeArgs(min int, max int) PositionalArgs {
 	}
 }
 
-// ExactValidArgs is DEPRECATED. Use ExactArgs instead.
+// ExactValidArgs returns an error if there are not exactly N positional args OR
+// there are any positional args that are not in the `ValidArgs` field of `Command`
+//
+// Deprecated: now `ExactArgs` honours `ValidArgs`, when defined and not empty
 func ExactValidArgs(n int) PositionalArgs {
 	return ExactArgs(n)
 }
 
-// OnlyValidArgs is DEPRECATED. Use ArbitraryArgs instead.
+// OnlyValidArgs returns an error if any args are not in the list of `ValidArgs`.
+//
+// Deprecated: now `ArbitraryArgs` honours `ValidArgs`, when defined and not empty
 func OnlyValidArgs(cmd *Command, args []string) error {
 	return ArbitraryArgs(cmd, args)
 }