cpv: define package_list in compare_strs doctest

This is not much of a doctest, since we aren't using compare_strs()
anywhere, but at least it doesn't error out.  Note that comparisons
have been reworked in Python 3 where cmp() has been removed.

diff --git a/pym/gentoolkit/cpv.py b/pym/gentoolkit/cpv.py
index cda68d75c65f5b843c8b3b2e95f294a83ed726bc..9c7243178170f358c7133e2e76101e73d1bf6b46 100644 (file)
--- a/pym/gentoolkit/cpv.py
+++ b/pym/gentoolkit/cpv.py
@@ -178,6 +178,7 @@ def compare_strs(pkg1, pkg2):
        as: package_list.sort(cpv.compare_strs)
 
        An alternative is to use the CPV descriptor from gentoolkit.cpv:
+       >>> package_list = ['sys-apps/portage-9999', 'media-video/ffmpeg-9999']
        >>> cpvs = sorted(CPV(x) for x in package_list)
 
        @see: >>> help(cmp)