Duplicate documentation files have been detected in the package
builds for Rawhide and Fedora 20. The likely cause is the unversioned
docdirs change in Fedora 20.

If your package %installs documentation files into %{_docdir}/%{name}/ to
store them in a subpackage, this now conflicts with using the %doc
macro in the base package. Since Fedora 20, the %doc macro installs into
the unversioned %{_docdir}/%{name}/ and includes everything in that
directory. One obvious fix is to decide between either using %doc or
installing into %{_docdir}/%{name}/ manually as explained in the
Packaging tricks Wiki section (for past dist releases and the versioned
docdir).

General discussion of this problem:
https://fedorahosted.org/fpc/ticket/338

Further information:
http://fedoraproject.org/wiki/Changes/UnversionedDocdirs
https://fedoraproject.org/wiki/Packaging_tricks#Installing_documentation:_2_paths

[semi-automated bug report]

[...]

=> libunistring-0.9.3-8.fc20.src.rpm
=> libunistring-0.9.3-8.fc20.i686 in fedora-development-i386
  File conflict with: libunistring-devel-0.9.3-8.fc20.i686
     /usr/share/doc/libunistring/libunistring_1.html
     /usr/share/doc/libunistring/libunistring_10.html
     /usr/share/doc/libunistring/libunistring_11.html
     /usr/share/doc/libunistring/libunistring_12.html
     /usr/share/doc/libunistring/libunistring_13.html
     /usr/share/doc/libunistring/libunistring_14.html
     /usr/share/doc/libunistring/libunistring_15.html
     /usr/share/doc/libunistring/libunistring_16.html
     /usr/share/doc/libunistring/libunistring_17.html
     /usr/share/doc/libunistring/libunistring_18.html
     /usr/share/doc/libunistring/libunistring_19.html
     /usr/share/doc/libunistring/libunistring_2.html
     /usr/share/doc/libunistring/libunistring_3.html
     /usr/share/doc/libunistring/libunistring_4.html
     /usr/share/doc/libunistring/libunistring_5.html
     /usr/share/doc/libunistring/libunistring_6.html
     /usr/share/doc/libunistring/libunistring_7.html
     /usr/share/doc/libunistring/libunistring_8.html
     /usr/share/doc/libunistring/libunistring_9.html
     /usr/share/doc/libunistring/libunistring_abt.html
     /usr/share/doc/libunistring/libunistring_toc.html

=> libunistring-0.9.3-8.fc20.src.rpm
=> libunistring-devel-0.9.3-8.fc20.i686 in fedora-development-i386
  File conflict with: libunistring-0.9.3-8.fc20.i686
     /usr/share/doc/libunistring/libunistring_1.html
     /usr/share/doc/libunistring/libunistring_10.html
     /usr/share/doc/libunistring/libunistring_11.html
     /usr/share/doc/libunistring/libunistring_12.html
     /usr/share/doc/libunistring/libunistring_13.html
     /usr/share/doc/libunistring/libunistring_14.html
     /usr/share/doc/libunistring/libunistring_15.html
     /usr/share/doc/libunistring/libunistring_16.html
     /usr/share/doc/libunistring/libunistring_17.html
     /usr/share/doc/libunistring/libunistring_18.html
     /usr/share/doc/libunistring/libunistring_19.html
     /usr/share/doc/libunistring/libunistring_2.html
     /usr/share/doc/libunistring/libunistring_3.html
     /usr/share/doc/libunistring/libunistring_4.html
     /usr/share/doc/libunistring/libunistring_5.html
     /usr/share/doc/libunistring/libunistring_6.html
     /usr/share/doc/libunistring/libunistring_7.html
     /usr/share/doc/libunistring/libunistring_8.html
     /usr/share/doc/libunistring/libunistring_9.html
     /usr/share/doc/libunistring/libunistring_abt.html
     /usr/share/doc/libunistring/libunistring_toc.html