Re-added shebang line that was removed

IanLee1521 · IanLee1521 · commit 05627df9e1e7 · 2016-05-24T08:46:16.000-07:00
diff --git a/docs/advanced.rst b/docs/advanced.rst
@@ -63,6 +63,7 @@ Another example is related to the `feature request #143
 at the beginning and the end of a file.  This use case is easy to implement
 through a custom wrapper for the PEP 8 library::
 
+  #!python
   import pep8
 
   LINES_SLICE = slice(14, -20)
