Copyedit builds

Trying again since the first PR seems to have been lost.

Docker-DCO-1.1-Signed-off-by: Fred Lifton fred.lifton@docker.com (github: fredlf)
I prefer minimizing the use of proper nouns and will gradually be implementing this preference throughout the docs. This is based on my experience at PL and elsewhere and is in keeping with Scott's views as well.