Update cat.en.md

subjects/cat.en.md

@@ -26,11 +26,11 @@ Write a program that has the same behaviour as the system's `cat` command-line.
 student@ubuntu:~/piscine-go/cat$ go build
 student@ubuntu:~/piscine-go/cat$ ./cat abc
 open abc: no such file or directory
-Hello
 student@ubuntu:~/piscine-go/cat$ ./cat quest8.txt
 "Programming is a skill best acquired by pratice and example rather than from books" by Alan Turing
 student@ubuntu:~/piscine-go/cat$ ./cat
 Hello
+Hello^C
 student@ubuntu:~/piscine-go/cat$ ./cat quest8.txt quest8T.txt
 "Programming is a skill best acquired by pratice and example rather than from books" by Alan Turing
 "Alan Mathison Turing was an English mathematician, computer scientist, logician, cryptanalyst. Turing was highly influential in the development of theoretical computer science, providing a formalisation of the concepts of algorithm and computation with the Turing machine, which can be considered a model of a general-purpose computer. Turing is widely considered to be the father of theoretical computer science and artificial intelligence."