Added spaces in Q.9 in order to avoid italicizing

Factorials were explained like 4! = 4[asterisk]3[asterisk]2[asterisk]1, which lead to some characters becoming italicized.

assignments/4-functions.md

@@ -25,10 +25,10 @@ Marks        Grade
 <=40          Fail
 
 9. Write a program to print the factorial of a number by defining a method named 'Factorial'.
-Factorial of any number n is represented by n! and is equal to 1*2*3*....*(n-1)*n. E.g.-
-4! = 1*2*3*4 = 24
-3! = 3*2*1 = 6
-2! = 2*1 = 2
+Factorial of any number n is represented by n! and is equal to 1 * 2 * 3 * .... * (n-1) *n. E.g.-
+4! = 1 * 2 * 3 * 4 = 24
+3! = 3 * 2 * 1 = 6
+2! = 2 * 1 = 2
 Also,
 1! = 1
 0! = 1