[go/en] Clarify safety of local variable address taking.

go.html.markdown

@@ -168,10 +168,11 @@ func learnNamedReturns(x, y int) (z int) {
 
 // Go is fully garbage collected. It has pointers but no pointer arithmetic.
 // You can make a mistake with a nil pointer, but not by incrementing a pointer.
+// Unlike in C/Cpp taking and returning an address of a local varible is also safe. 
 func learnMemory() (p, q *int) {
 	// Named return values p and q have type pointer to int.
 	p = new(int) // Built-in function new allocates memory.
-	// The allocated int is initialized to 0, p is no longer nil.
+	// The allocated int slice is initialized to 0, p is no longer nil.
 	s := make([]int, 20) // Allocate 20 ints as a single block of memory.
 	s[3] = 7             // Assign one of them.
 	r := -2              // Declare another local variable.