Fix man and commandline docs

- missing help option in `docs/reference/commandline/*.md` (some files
  have it, the other I fixed didn't)
- missing `[OPTIONS]` in Usage description
- missing options
- formatting
- start/stop idempotence

Signed-off-by: Antonio Murdaca <amurdaca@redhat.com>

docs/reference/commandline/commit.md

@@ -17,6 +17,7 @@ weight=1
 
       -a, --author=""     Author (e.g., "John Hannibal Smith <hannibal@a-team.com>")
       -c, --change=[]     Apply specified Dockerfile instructions while committing the image
+      --help=false        Print usage
       -m, --message=""    Commit message
       -p, --pause=true    Pause container during commit