See for example http://www.gentoo.org/proj/en/glep/glep-0058.html The links for the GLEPs in the Requires: field are missing a '/' which causes them to break. The very simple fix is to add that leading '/' in line 31 of file <sitedir>/docutils/transforms/gleps.py, which is gleptrans.py from the tarball.
*** This bug has been marked as a duplicate of bug 297011 ***