Correct documentation

ez_setup.py

@@ -268,7 +268,7 @@ def download_setuptools(version=DEFAULT_VERSION, download_base=DEFAULT_URL,
     Download setuptools from a specified location and return its filename
 
     `version` should be a valid setuptools version number that is available
-    as an egg for download under the `download_base` URL (which should end
+    as an sdist for download under the `download_base` URL (which should end
     with a '/'). `to_dir` is the directory where the egg will be downloaded.
     `delay` is the number of seconds to pause before an actual download
     attempt.