Normalized exercise output, answers (#41)

1. All exercises should print a trailing \n
2. The build script should always show you _exactly_ what it's looking
   for when you get it wrong. Therefore, .output should be set to the
   exact expected output.

exercises/043_pointers5.zig

@@ -73,7 +73,7 @@ fn printCharacter(c: *Character) void {
         .warrior => "Warrior",
     };
 
-    std.debug.print("{s} (G:{} H:{} XP:{})", .{
+    std.debug.print("{s} (G:{} H:{} XP:{})\n", .{
         class_name,
         c.gold,
         c.health,