pretty print enhancements + comparison of generic functions

lib/primitives/dynamic.js

@@ -1,6 +1,7 @@
 import { assignFn } from "../generics/generics.js";
 
 export const newDynamic = i => t => ({i, t});
+
 export const getInst = lnk => lnk.i;
 export const getType = lnk => lnk.t;
 

lib/primitives/unit.js

@@ -1,3 +1,7 @@
-export const unit = {};
+import { inspect } from "node:util";
+
+export const unit = {
+  [inspect.custom](depth, options, inspect){ return '()'; }
+};
 
 export const eqUnit = _ => _ => true;