I've moved the docs.css to last so it can tweak any existing css, and
then set that to the same grey colour used for 'normal' text.
While testing I found and fixed an over-zealous line wrap.
Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@docker.com> (github: SvenDowideit)
Upstream-commit: b7cb370393
Component: cli