Merge pull request #1141 from benoit-pierre/fix_py26_support

Fix Python 2.6 support

setuptools/command/sdist.py

@@ -38,7 +38,7 @@ class sdist(sdist_add_defaults, orig.sdist):
     negative_opt = {}
 
     README_EXTENSIONS = ['', '.rst', '.txt', '.md']
-    READMES = tuple('README{}'.format(ext) for ext in README_EXTENSIONS)
+    READMES = tuple('README{0}'.format(ext) for ext in README_EXTENSIONS)
 
     def run(self):
         self.run_command('egg_info')