message: simple_subunit.v rm comments for better readability
diff: -/*
  -
  - In order to create a new unit you have to make new class derived from Unit.
  -
  - You can use sphinx-hwt plugin for sphinx document generator
  - to generate interactive schematic and documentation.
  - Schematic is generated by directive bellow.
  -
  - .. hwt-schematic::
  -
  -*/
  module subunit0(input a,
  output b
  );
  assign b = a;
  endmodule
  -/*
  -
  - .. hwt-schematic::
  -*/
  module SimpleSubunit(input a,
  output b
  );
  