Fix typo

exercises/048_methods2.zig

@@ -11,7 +11,7 @@ const Elephant = struct {
 
     // New Elephant methods!
     pub fn getTail(self: *Elephant) *Elephant {
-        return self.tail.?; // Remember, this is means "orelse unreachable"
+        return self.tail.?; // Remember, this means "orelse unreachable"
     }
 
     pub fn hasTail(self: *Elephant) bool {