Build the documentation:
dune build @doc -w --verbose
In another tab:
xdg-open _build/default/_doc/_html/libP5/LibP5__Extension/index.html
You can see two issues
-
toplevel documentation for the module appears twice
-
there is weird mangling of module names:
module $Open__24_546 = Pcaml module $Open__25_557 = Stdlib.Printf