Mark len call as a code snippet in stdtypes.rst. (GH-9804)

miss-islington · andresdelfino · web-flow · commit 55e1173c4f9a · 2018-11-07T09:54:48.000-08:00
(cherry picked from commit ca03f3b) Co-authored-by: Andrés Delfino <adelfino@gmail.com>
diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
@@ -3743,7 +3743,7 @@ copying.
 
       ``nbytes == product(shape) * itemsize == len(m.tobytes())``. This is
       the amount of space in bytes that the array would use in a contiguous
-      representation. It is not necessarily equal to len(m)::
+      representation. It is not necessarily equal to ``len(m)``::
 
          >>> import array
          >>> a = array.array('i', [1,2,3,4,5])
