docs(sumascii): fix subject

- added more output examples
- made instructions more clear

subjects/sumascii/README.md

@@ -2,7 +2,7 @@
 
 ### Instructions
 
-Create a program that receives an argument and displays the sum of the ASCII value of each character. The sum will be a number representing the value after the sum of the bytes. 
+Create a program that receives an argument and displays the byte sum in decimal format, of the ASCII value of each character. The sum will be a number representing the value after the sum of the bytes. 
 
 - If there is an invalid input print `0`.
 
@@ -11,6 +11,8 @@ Create a program that receives an argument and displays the sum of the ASCII val
 ```console
 $ go run . "hi" | cat -e
 209$
+$ go run . "something larger" | cat -e
+107$
 $ go run . "" | cat -e
 0$
 $ go run . "S" "A"