DOC: Edits for Book 2 Chapter 1 documentation in the Examples.

Chapter One: Reading and Writing Images

Fix Michka's comments

Change-Id: I9b244bce994e0bcd68aee1984bce38651b5d621c
Merge topic 'book-2-chapter-1-editS'

b7f2c60c DOC: Edits for Book 2 Chapter 1 documentation in the Examples.