HELP command syntax

>>-+-HELP-+--+-----------------------------------+-------------><
   '-H----'  '-+-command_name----+--| Operands |-'   
               '-subcommand_name-'                   

Operands

   .-ALL--------------------------.   
|--+------------------------------+-----------------------------|
   +-FUNCTION---------------------+   
   +-SYNTAX-----------------------+   
   +-OPERANDS-+-----------------+-+   
   |          |   .---------.   | |   
   |          |   V         |   | |   
   |          '-(---operand-+-)-' |   
   +-POSITIONAL(nn)---------------+   
   |        .------------.        |   
   |        V            |        |   
   '-MSGID(---identifier-+-)------'