Adjust image alignment.

diff --git a/chapters/15.rst b/chapters/15.rst
index c46931cba7886b5739140cd6b6ff64a0466b547c..800455220fc40152d709dd73a274f6c18cb9f7bb 100644 (file)
--- a/chapters/15.rst
+++ b/chapters/15.rst
@@ -210,6 +210,7 @@ processes it as if the statements and directives included in
 directive is.
 
 .. image:: /images/includes.png
+  :align: center
 
 In every Inform game we Include the library files ``Parser``, 
 ``VerbLib`` and ``Grammar``, but we may Include other files. For