add ini option to disable string escape for parametrization

doc/en/parametrize.rst

@@ -81,6 +81,21 @@ them in turn:
     test_expectation.py:8: AssertionError
     ==================== 1 failed, 2 passed in 0.12 seconds ====================
 
+.. note::
+
+    pytest by default escapes any non-ascii characters used in unicode strings
+    for the parametrization because it has several downsides.
+    If however you would like to use unicode strings in parametrization, use this option in your ``pytest.ini``:
+
+    .. code-block:: ini
+
+        [pytest]
+        disable_test_id_escaping_and_forfeit_all_rights_to_community_support = True
+
+    to disable this behavior, but keep in mind that this might cause unwanted side effects and
+    even bugs depending on the OS used and plugins currently installed, so use it at your own risk.
+
+
 As designed in this example, only one pair of input/output values fails
 the simple test function.  And as usual with test function arguments,
 you can see the ``input`` and ``output`` values in the traceback.