[tests] Fix invalid escape sequences

test/test_compat.py

@@ -39,7 +39,7 @@ class TestCompat(unittest.TestCase):
 
     def test_compat_expanduser(self):
         old_home = os.environ.get('HOME')
-        test_str = 'C:\Documents and Settings\тест\Application Data'
+        test_str = r'C:\Documents and Settings\тест\Application Data'
         compat_setenv('HOME', test_str)
         self.assertEqual(compat_expanduser('~'), test_str)
         compat_setenv('HOME', old_home or '')

test/test_postprocessors.py

@@ -14,4 +14,4 @@ from youtube_dl.postprocessor import MetadataFromTitlePP
 class TestMetadataFromTitle(unittest.TestCase):
     def test_format_to_regex(self):
         pp = MetadataFromTitlePP(None, '%(title)s - %(artist)s')
-        self.assertEqual(pp._titleregex, '(?P<title>.+)\ \-\ (?P<artist>.+)')
+        self.assertEqual(pp._titleregex, r'(?P<title>.+)\ \-\ (?P<artist>.+)')