convert superflous doctest to code-block

vchuravy · vchuravy · commit 83ef854c91ea · 2016-06-24T03:37:01.000+09:00
diff --git a/doc/manual/documentation.rst b/doc/manual/documentation.rst
@@ -30,7 +30,7 @@ macros and pass them to the ``@doc`` macro just as well.
 
 Here is a more complex example, still using Markdown:
 
-.. doctest::
+.. code-block:: julia
 
     """
         bar(x[, y])
