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/wait.md

@@ -11,6 +11,8 @@ weight=1
 
 # wait
 
-    Usage: docker wait CONTAINER [CONTAINER...]
+    Usage: docker wait [OPTIONS] CONTAINER [CONTAINER...]
 
-    Block until a container stops, then print its exit code.
+    Block until a container stops, then print its exit code.
+
+      --help=false    Print usage