Fix formatting of merged files

_pytest/junitxml.py

@@ -233,7 +233,6 @@ class _NodeReporter(object):
             )
             self.write_captured_output(report)
 
-
     def finalize(self):
         data = self.to_xml().unicode(indent=0)
         self.__dict__.clear()

changelog/3491.bugfix.rst

@@ -1 +1 @@
-Fixed a bug where stdout and stderr were logged twice by junitxml when a test was marked xfail.
+Fixed a bug where stdout and stderr were logged twice by junitxml when a test was marked xfail.

testing/test_junitxml.py

@@ -504,7 +504,8 @@ class TestPython(object):
         # assert "ValueError" in fnode.toxml()
 
     def test_xfail_captures_output_once(self, testdir):
-        testdir.makepyfile("""
+        testdir.makepyfile(
+            """
             import sys
             import pytest
 
@@ -513,12 +514,13 @@ class TestPython(object):
                 sys.stdout.write('XFAIL This is stdout')
                 sys.stderr.write('XFAIL This is stderr')
                 assert 0
-        """)
+        """
+        )
         result, dom = runandparse(testdir)
         node = dom.find_first_by_tag("testsuite")
         tnode = node.find_first_by_tag("testcase")
-        assert len(tnode.find_by_tag('system-err')) == 1
-        assert len(tnode.find_by_tag('system-out')) == 1
+        assert len(tnode.find_by_tag("system-err")) == 1
+        assert len(tnode.find_by_tag("system-out")) == 1
 
     def test_xfailure_xpass(self, testdir):
         testdir.makepyfile(

testing/test_unittest.py

@@ -928,15 +928,14 @@ def test_class_method_containing_test_issue1558(testdir):
 
 
 @pytest.mark.issue(3498)
-@pytest.mark.parametrize("base", [
-    'six.moves.builtins.object',
-    'unittest.TestCase',
-    'unittest2.TestCase',
-])
+@pytest.mark.parametrize(
+    "base", ["six.moves.builtins.object", "unittest.TestCase", "unittest2.TestCase"]
+)
 def test_usefixtures_marker_on_unittest(base, testdir):
-    module = base.rsplit('.', 1)[0]
+    module = base.rsplit(".", 1)[0]
     pytest.importorskip(module)
-    testdir.makepyfile(conftest="""
+    testdir.makepyfile(
+        conftest="""
         import pytest
 
         @pytest.fixture(scope='function')
@@ -961,9 +960,11 @@ def test_usefixtures_marker_on_unittest(base, testdir):
             for item in items:
                node_and_marks(item)
 
-        """)
+        """
+    )
 
-    testdir.makepyfile("""
+    testdir.makepyfile(
+        """
         import pytest
         import {module}
 
@@ -982,7 +983,10 @@ def test_usefixtures_marker_on_unittest(base, testdir):
                 assert self.fixture2
 
 
-    """.format(module=module, base=base))
+    """.format(
+            module=module, base=base
+        )
+    )
 
-    result = testdir.runpytest('-s')
+    result = testdir.runpytest("-s")
     result.assert_outcomes(passed=2)