[Suggestion] 26. Value types 1. Displaying the player's health and energy - doc of str() to be more specific

**Suggestion:**
With `26. Value types 1. Displaying the player's health and energy`, the documentation on `str()` is good but it requires for the person to read through the entire description.

Could the documentation have the argument listed as well, ie: `String str(argument)` to allow for the usage of the method to be obvious at a glance?