Revise docs.

doc/src/language/modules/import.md

@@ -63,7 +63,9 @@ cause a stack overflow in the [`Engine`], unless stopped by setting a limit for
 For instance, importing itself always causes an infinite recursion:
 
 ```rust
-// This file is 'hello.rhai'
+--------------
+| hello.rhai |
+--------------
 
 import "hello" as foo;          // import itself - infinite recursion!
 
@@ -73,11 +75,18 @@ foo::do_something();
 Modules cross-referencing also cause infinite recursion:
 
 ```rust
-// This file is 'hello.rhai' - references 'world.rhai'
+--------------
+| hello.rhai |
+--------------
+
 import "world" as foo;
 foo::do_something();
 
-// This file is 'world.rhai' - references 'hello.rhai'
+
+--------------
+| world.rhai |
+--------------
+
 import "hello" as bar;
 bar::do_something_else();
 ```