Wraps code samples and changes to markup after O'Reilly run

After looking at O'Reilly PDF, address formatting issues.

Here's their wrapping points:

Body (top-level code): 80
Examples: 84
Lists: 76
Sidebars: 78
Notes/Warnings: 74

Change-Id: I98c62b4add38413d38647330d7572d138df33723
Merge "Wraps code samples and changes to markup after O'Reilly run"