Misc. fixes and formatting clean-up

Cleaned up and corrected some invalid "example responses".
Added some missing double-quotes for examples that resulted in invalid JSON.
Other general cleanup of stray characters and typos.

Docker-DCO-1.1-Signed-off-by: Ted M. Young <tedyoung@gmail.com> (github: SvenDowideit)
Apply @tedyoung's changes to the entire set of API docs.

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@docker.com> (github: SvenDowideit)
Merge pull request #8156 from SvenDowideit/tedyoung-patch-1

 Misc. fixes and formatting clean-up