Better message on auto generated index file
Closes
@@ -101,7 +101,8 @@ Welcome to Read the Docs
This is an autogenerated index file.
-Please create a ``{dir}/index.{ext}`` or ``{dir}/README.{ext}`` file with your own content.
+Please create a ``index.{ext}`` or ``README.{ext}`` file with your own content
+under the root directory in your repository (or under ``/docs`` directory).
If you want to use another markup, choose a different builder in your settings.
"""
