If I recall properly this is no longer a requirement.

@fevangelou

If I recall properly this is no longer a requirement.

For the JED it is dropped. See:
http://community.joomla.org/blogs/leadership/1737-the-jed-indexhtml-requirement-dropped.html

I'm not sure that it is also dropped for the CMS itself.

Some files may have been leftover by accident or some may have been leftover to keep empty but needed folders (e.g. the /cache folder) from not being ignored by git ;)

As a general rule, they are not needed except for that git thing.

I didn't know about that change.
But when you look at the Joomla! CMS every folder contains a index.html file. Why in this folders its not exciting?

The JED dropped it because it slowed down the process. I think we can add the index file because it exciting in every folder of Joomla at the moment

There is a feature tracker to adjust the .htaccess rules so directory traversals are disabled by default. See http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_item_id=30192.
It would make the index.html files useless. I don't think we have an official decision yet for the CMS. We mostly don't care much anymore about them

I don't think there is a real need for those files in the templates override folder. Or do you see a security risk if someone could see the files in those folders?

nope, i don't see any security risks ;-)
thanks for the information, i didn't know that before

pull request can be closed

Closing as requested