Fix wrong Python highlighting in directory hierarchy code block.
diff --git a/Doc/tutorial/modules.rst b/Doc/tutorial/modules.rst
index bcbb761..1e792d1 100644
--- a/Doc/tutorial/modules.rst
+++ b/Doc/tutorial/modules.rst
@@ -368,7 +368,9 @@
(such as mixing, adding echo, applying an equalizer function, creating an
artificial stereo effect), so in addition you will be writing a never-ending
stream of modules to perform these operations. Here's a possible structure for
-your package (expressed in terms of a hierarchical filesystem)::
+your package (expressed in terms of a hierarchical filesystem):
+
+.. code-block:: text
sound/ Top-level package
__init__.py Initialize the sound package