[GRASS5] code documentation

[Helena]

We are working on some new modules as well as updating the older ones.
It would be very useful for others who would like to ever modify or just
look into the code to better understand what it is doing to include
the equations and description of variables (inluding the units, etc.)

Is anybody aware of a module in GRASS which has this done in a good way
that
we could use as a "standard"? If not, are there any suggestions on how
to do
this, whether to use any existing tools, etc.?

thank you,

Helena