changing doc format and HTML literals

site/doc/pages/unit_call.txt

@@ -7,26 +7,31 @@ function_name : name of the function to invoke
 call_param : optional, call parameter
 return value : DTree* returned from function
 
-:desc
+:see
+>ob
+
+:content
 Calls an exported function inside another UCE file.
 
-Use `unit_call()` when you need a structured data exchange between units rather than rendered HTML output.
+Use `unit_call()` when you need structured data exchange between units rather than rendered HTML output.
 
 The callee must expose an `EXPORT` function whose name matches `function_name`. Arguments are passed through `call_param`, and the return value is a `DTree*` owned by the callee.
 
-:Example
+Example:
+
+```cpp
 // export a function
 EXPORT DTree* test_func(DTree* call_param)
 {
 	print("HELLO FROM TEST FUNCTION");
 	return(0);
 }
+
 // use that function in another file
 unit_call("call_file_funcs.uce", "test_func");
+```
 
-:related
-**PHP:** `include`, `require`, or calling a function from an included module, especially when returning arrays or objects instead of rendering a view.
-**JavaScript / Node.js:** Importing a module and calling an exported function, or dynamically loading a module and passing structured arguments.
+Related:
 
-:see
->ob
+- PHP: `include`, `require`, or calling a function from an included module, especially when returning arrays or objects instead of rendering a view
+- JavaScript / Node.js: importing a module and calling an exported function, or dynamically loading a module and passing structured arguments