use list() to wrap range() in itertools.permutations() example; thanks to Romain MORLEVAT from docs@

sandrotosi · sandrotosi · commit 7386662699da · 2011-12-25T17:25:45.000+01:00
diff --git a/Doc/library/itertools.rst b/Doc/library/itertools.rst
@@ -419,7 +419,7 @@ loops that truncate the stream.
             if r > n:
                 return
             indices = list(range(n))
-            cycles = range(n, n-r, -1)
+            cycles = list(range(n, n-r, -1))
             yield tuple(pool[i] for i in indices[:r])
             while n:
                 for i in reversed(range(r)):
