View Full Lines of Code While Reading on a Kindle

While reading O'Reilly books on a Kindle, long lines of code wrap to multiple lines. This can be confusing. I've found that it's best to change the orientation of the device to landscape.
Press the Aa button and use the down cross key until you get to the line with pictures of a Kindle rotated in different directions. Use the left/right keys to select one of the sideways orientations.
Your book will appear the long way across the screen, and lines of code won't be clipped.