Fix W605 warnings

"W605 invalid escape sequence" would be a error in future version
of python.

Change-Id: I3828d89a2539caf41eb2c3573aa9c541e0b9b885

doc/source/conf.py

@@ -279,7 +279,7 @@ config_generator_config_file = [
 
 linkcheck_anchors_ignore = [
     # skip gerrit anchors
-    '\/q\/.*',
-    'q\,.*',
-    '\/c\/.*'
+    r'\/q\/.*',
+    r'q\,.*',
+    r'\/c\/.*'
 ]

neutron/tests/unit/agent/linux/test_ip_monitor.py

@@ -21,7 +21,7 @@ class TestIPMonitorEvent(base.BaseTestCase):
     def test_from_text_parses_added_line(self):
         event = ip_monitor.IPMonitorEvent.from_text(
             '3: wlp3s0    inet 192.168.3.59/24 brd 192.168.3.255 '
-            'scope global dynamic wlp3s0\       valid_lft 300sec '
+            r'scope global dynamic wlp3s0\       valid_lft 300sec '
             'preferred_lft 300sec')
         self.assertEqual('wlp3s0', event.interface)
         self.assertTrue(event.added)