Update usr_41.txt only

Author: h-east

en/usr_41.txt

@@ -877,7 +877,8 @@ Other computation:					*bitwise-function*
 	srand()			initialize seed used by rand()
 
 Variables:						*var-functions*
-	instanceof()		check if a variable is an instance of a given class
+	instanceof()		check if a variable is an instance of a given
+				class
 	type()			type of a variable as a number
 	typename()		type of a variable as text
 	islocked()		check if a variable is locked