Chapter 7 - Minor corrections / confusion / formatting issues (Pages 251, 257, 272)

[scouttyg]

1. On page 251, we're told to create a RPGCameraManager script, but most times we're also told where to put it. For the case of this Script, it probably makes sense to put this in Assets -> Scripts -> Managers.
2. On page 257, under The Enemy Class, the last line in the section says:

[...] using a regular float variable to track hit-points instead.
The code formatting either shouldn't be present, or should end possibly after float variable.

3. On page 272, under OnCollisionEnter2D, it later makes sense that we want both this method and OnCollisionExit2D to be part of our Enemy Class, but since the section starts off with explaining what the method is, it sounded like it was at first just mentioning what it was, but then immediately gave us a method. Comment // 2 seems to help clarify this is in Enemy, but it still caught me a bit off guard.