include brunos review suggestions for changes

changelog/1.removal

@@ -1 +1 @@
-remove the implementation of "boxed" and use pytest-forked for providing ``--boxed``
+``--boxed`` functionality has been moved to a separate plugin, `pytest-forked <https://github.com/pytest-dev/pytest-forked>`_. This release now depends on `` pytest-forked`` and provides ``--boxed`` as a backward compatibility option.

example/boxed.txt

@@ -1,3 +1,9 @@
+.. note::
+
+  Since 2.0, the actual implementation of the ``--boxed`` option has been moved to a 
+  separate plugin, `pytest-forked <https://github.com/pytest-dev/pytest-forked>`_ 
+  which can be installed independently. The ``--boxed`` command-line options remains 
+  for backward compatibility reasons.
 
 
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