docker container ...
This fix updates the markdown for man pages of `docker container ...` so that they are consistent. The changes are based on feedback: https://github.com/docker/docker/pull/30645#discussion_r99020188 https://github.com/docker/docker/pull/30645#discussion_r99020304 1. Use `H2 (##)` as needed 2. Use unrpiviledged prompt (`$`) instead of (`#`) This PR convers files under man/src/container/*.md Signed-off-by: Yong Tang <yong.tang.github@outlook.com> Upstream-commit: 6c27237f766665142b477083690450e0c745584e Component: engine