Add _ prefix to the wrapper subcommands .

So `_docker-dev` could be invoked as `docker dev` without `docker-dev`
getting in the way of tab completion. Renamed the current subcommands
accordingly.

Documents/bin/wrapper

@@ -4,6 +4,10 @@ set -eu
 basename="$(basename "$0")"
 command="$(command -pv "$basename")" || { echo "$basename: not found"; exit 127; }
 if alias="$(command -v "$basename-${1:-}")"
+then
+    shift
+    "$alias" "$@"
+elif alias="$(command -v "_$basename-${1:-}")"
 then
     shift
     "$alias" "$@"