Replaced an antiquated pattern.

Thanks Lennart Regebro for pointing it out.

django/template/base.py

@@ -641,7 +641,7 @@ class FilterExpression(object):
                                       (name, len(nondefs), plen))
 
         # Defaults can be overridden.
-        defaults = defaults and list(defaults) or []
+        defaults = list(defaults) if defaults else []
         try:
             for parg in provided:
                 defaults.pop(0)

django/template/defaulttags.py

@@ -127,7 +127,7 @@ class ForNode(Node):
             self.nodelist_empty = nodelist_empty
 
     def __repr__(self):
-        reversed_text = self.is_reversed and ' reversed' or ''
+        reversed_text = ' reversed' if self.is_reversed else ''
         return "<For Node: for %s in %s, tail_len: %d%s>" % \
             (', '.join(self.loopvars), self.sequence, len(self.nodelist_loop),
              reversed_text)
@@ -788,7 +788,7 @@ def do_for(parser, token):
                                   " words: %s" % token.contents)
 
     is_reversed = bits[-1] == 'reversed'
-    in_index = is_reversed and -3 or -2
+    in_index = -3 if is_reversed else -2
     if bits[in_index] != 'in':
         raise TemplateSyntaxError("'for' statements should use the format"
                                   " 'for x in y': %s" % token.contents)