Use env hack in python scripts.

debian/changelog

@@ -7,6 +7,7 @@ ikiwiki (3.20091219) UNRELEASED; urgency=low
     example sites also used by auto-blog.setup. The example setup file
     can be generated at any time using ikiwiki --dumpsetup so I do
     not see a reason to ship it. Closes: #562183
+  * Use env hack in python scripts.
 
  -- Joey Hess <joeyh@debian.org>  Fri, 25 Dec 2009 14:31:22 -0500
 

doc/bugs/rst_plugin_has_python_hardcode_in_shebang_line.mdwn

@@ -11,3 +11,5 @@ Thus I suggest to change the shebang line to:
 
    #!/usr/bin/env python
 
+> [[done]], although the irony of all the perl hashbangs in ikiwiki
+> being hardcoded doesn't escape me. --[[Joey]] 

plugins/pythondemo

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 #
 # pythondemo — demo Python ikiwiki plugin

plugins/rst

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 #
 # rst — xml-rpc-based ikiwiki plugin to process RST files