Nitpicking - tempdir naming, also backslashes are bad

Tempdirs should have useful prefixes to aid in collecting information
    about failed tests.
Implicit concatenation is better than backslash line continuation.

pelican/tests/test_webassets.py

@@ -25,7 +25,7 @@ class TestWebAssets(unittest.TestCase):
     """Base class for testing webassets."""
 
     def setUp(self, override=None):
-        self.temp_path = mkdtemp()
+        self.temp_path = mkdtemp(prefix='pelicantests.')
         settings = {
             'PATH': os.path.join(CUR_DIR, 'content', 'TestCategory'),
             'OUTPUT_PATH': self.temp_path,