- Add pytest4.patch to make testsuite pass even with pytest 4

(gh#PyCQA/redbaron#179)

OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-redbaron?expand=0&rev=8

pytest4.patch

@@ -0,0 +1,44 @@
+From 812081b7bd8774ceb61016ac37da43107c26eea2 Mon Sep 17 00:00:00 2001
+From: Felix Yan <felixonmars@archlinux.org>
+Date: Mon, 18 Feb 2019 02:15:55 +0800
+Subject: [PATCH] Fix tests under pytest 4
+
+Pytest 4 removed support for calling fixtures directly: https://docs.pytest.org/en/latest/deprecations.html#calling-fixtures-directly
+
+This leads to an error when trying to run the tests:
+```
+==================================== ERRORS ====================================
+_________________ ERROR collecting tests/test_bounding_box.py __________________
+Fixture "red" called directly. Fixtures are not meant to be called directly,
+but are created automatically when test functions request them as parameters.
+See https://docs.pytest.org/en/latest/fixture.html for more information about fixtures, and
+https://docs.pytest.org/en/latest/deprecations.html#calling-fixtures-directly about how to update your code.
+```
+---
+ tests/test_bounding_box.py | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/tests/test_bounding_box.py b/tests/test_bounding_box.py
+index f04c6da..e62a1ca 100644
+--- a/tests/test_bounding_box.py
++++ b/tests/test_bounding_box.py
+@@ -8,7 +8,6 @@
+ from redbaron import RedBaron
+ 
+ 
+-@pytest.fixture
+ def red():
+     return RedBaron("""\
+ @deco
+@@ -17,6 +16,11 @@ def a(c, d):
+ """)
+ 
+ 
++@pytest.fixture(name="red")
++def red_fixture():
++    return red()
++
++
+ fst = red()
+ bounding_boxes = [
+     (((1, 1),  (4, 0)),  ((1, 1), (4, 0)), fst),