Apparently this is done by the uBlock Origin's own "uBlock Filters"[1][2] with this reason:
# http://libregraphicsworld.org/blog/entry/anatomy-of-sourceforge-gimp-controversy
# https://blog.l0cal.com/2015/06/02/what-happened-to-sourceforge/
# Using `other` will cause the whole site to be blocked through strict blocking,
# yet the site will render properly if a user still decide to go ahead.
||sourceforge.net^$other
I'm a little bit unsure whether this is a good thing or not. But personally, given SourceForge's recent behavior, I'm kinda happy that uBlock Origin did this (as SourceForge have clearly stepped into the ranks of malware-spreading sites).[1]: https://github.com/gorhill/uBlock/blob/ed130afc6f3a70e2c2a68...
[2]: https://github.com/gorhill/uBlock/commit/c4e82357efaf18bac3f...