Largely reduce the number of pylint warnings and fix one typo.

watchlists.py

Index: watchlists.py
diff --git a/watchlists.py b/watchlists.py
index 9d38faf49f8fc8cd1979a05e7a0c487b425fb217..57b810cb179f0c3ecc02392032848b4e5ed8f795 100755
--- a/watchlists.py
+++ b/watchlists.py
@@ -106,9 +106,11 @@ class Watchlists(object):
     for path in paths:
       path = path.replace(os.sep, '/')
       for name, rule in self._defns.iteritems():
-        if name not in self._watchlists: continue
+        if name not in self._watchlists:
+          continue
         rex_str = rule.get('filepath')
-        if not rex_str: continue
+        if not rex_str:
+          continue
         if re.search(rex_str, path):
           map(watchers.add, self._watchlists[name])
     return list(watchers)