Fix code block in wrapper code

README.rst

@@ -93,7 +93,8 @@ Wrapper
 Mausoleum may be imported as a module as seen in the following example:
 
 .. code:: python
-    :number-lines: 0
+    :linenos:
+
 
     import mausoleum.wrapper
 
@@ -105,6 +106,7 @@ Mausoleum may be imported as a module as seen in the following example:
             key = '{}.key' .format(name)
             mausoleum.wrapper.construct_tomb(name, size, key, password)
 
+
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