update interactive reload limitation

doc/en/interactive.rst

@@ -63,8 +63,8 @@ circumstances.
 * ``__main__`` module (i.e. test_plan.py) cannot be reloaded. Because of this,
   it is recommended that test suites are defined in seperate modules. It is a
   good idea to keep the main script simple.
-* Testplan is not able to reload module that is under *Namespace Package*, the
-  workaround is to add dummy __init__.py file.
+* Testplan is not able to reload module that is under **Namespace Package**, the
+  workaround is to add dummy ``__init__.py`` file.
 * Unlike testcases that can be added/removed/modified, adding/removing/renaming
   testsuite class will not take effect after reloading.
 * Modules or objects imported using ``from some_module import *`` syntax are
@@ -73,6 +73,12 @@ circumstances.
 * In interactive mode, all modules containing test targets will be loaded at
   the same time, if the modules from which tasks are scheduled have the same
   name, they won't be reloaded properly.
+* `modulefinder.ModuleFinder <https://docs.python.org/3/library/modulefinder.html#modulefinder.ModuleFinder>`_
+  works purely on static analysis, which means it is completely ignorant of any
+  programmatic imports as well as imports requiring ``sys.path`` manipulation.
+  As a result, such dependencies may not be reloaded. In these cases, user may
+  need to use the ``extra_deps`` parameter of the ``@test_plan`` decorator to
+  specify these dependencies.
 
 
 .. _Interactive_UI: