update docker volume man pages

- added --help option
- fixed several formatting problems

Also added --help to volume inspect reference page.

Signed-off-by: Harald Albers <github@albersweb.de>
Upstream-commit: e8447c157d
Component: cli

components/cli/docs/reference/commandline/volume_inspect.md

@@ -15,6 +15,7 @@ parent = "smn_cli"
     Inspect one or more volumes
 
     -f, --format=       Format the output using the given go template.
+    --help=false        Print usage
 
 Returns information about a volume. By default, this command renders all results
 in a JSON array. You can specify an alternate format to execute a given template