Fixed excercises to reflect latest version.
Fixed excercises to reflect latest version.

The way `?`, `A` and `.x` has changed and this causes the examples to not function properly. I've corrected them, except the one that uses `.x` because I don't know how.
aadeebamou/pyth,gcq/pyth,jakobkogler/pyth,isaacg1/pyth,gcq/pyth,jakobkogler/pyth,aadeebamou/pyth,isaacg1/pyth