Python 3 preparation: use sum() instead of reduce().

reduce() has changed from a built-in function to something in
functools in Python 3.  However, since both uses were with
operator.add / operator.__add__, it seemed to make more sense to use
sum() instead of functools.reduce().

Author: jsm28

roundup/cgi/PageTemplates/MultiMapping.py

@@ -17,7 +17,7 @@ def get(self, key, default=_marker):
             raise KeyError(key)
         return default
     def __len__(self):
-        return reduce(operator.add, [len(x) for x in self.stores], 0)
+        return sum([len(x) for x in self.stores])
     def push(self, store):
         self.stores.append(store)
     def pop(self):

tools/pygettext.py

@@ -467,7 +467,7 @@ def write(self, fp):
                 # If the entry was gleaned out of a docstring, then add a
                 # comment stating so.  This is to aid translators who may wish
                 # to skip translating some unimportant docstrings.
-                if reduce(operator.__add__, v.values()):
+                if sum(v.values()):
                     isdocstring = 1
                 # k is the message string, v is a dictionary-set of (filename,
                 # lineno) tuples.  We want to sort the entries in v first by