3 summary = show the long help text
5 If no non-option argument is supplied to the help subcommand and --long
6 is not given, only the names of all subcommands are shown. With --long
7 the purpose of each command is printed as well.
9 If the name of a subcommand is supplied and --long is given, the help
10 text for the given subcommand contains the synopsis, the purpose and
11 the description of the specified command, followed by the option list
12 including summary and help text of each option. Without --long the
13 description of the command and the option help are omitted.