Fix py2.6 compat issues

Author: Jordan Adler

src/future/backports/misc.py

@@ -817,7 +817,7 @@ def __delitem__(self, key):
         try:
             del self.maps[0][key]
         except KeyError:
-            raise KeyError('Key not found in the first mapping: {!r}'.format(key))
+            raise KeyError('Key not found in the first mapping: {0!r}'.format(key))
 
     def popitem(self):
         'Remove and return an item pair from maps[0]. Raise KeyError is maps[0] is empty.'
@@ -831,7 +831,7 @@ def pop(self, key, *args):
         try:
             return self.maps[0].pop(key, *args)
         except KeyError:
-            raise KeyError('Key not found in the first mapping: {!r}'.format(key))
+            raise KeyError('Key not found in the first mapping: {0!r}'.format(key))
 
     def clear(self):
         'Clear maps[0], leaving maps[1:] intact.'

tests/test_future/test_futurize.py

@@ -1194,7 +1194,7 @@ def total_count(self):
 
         x = 3 / 2
         y = 3. / 2
-        foo = range(100)
+        foo = list(range(100))
         assert x == 1 and isinstance(x, int)
         assert y == 1.5 and isinstance(y, float)
         a = 1 + foo[len(foo) / 2]