Commit rev5960:0db2621b6fee has a new test for unicode strings in the indexer. For python2, the test is marked xfail, but I have passing tests for whoosh and sqlite.

indexer (native) and xapian both fail. Native crashes while trying
to convert the unicode string to python2 string. Xapian just fails
to find the word in the index.

Commit is running through CI at: https://travis-ci.org/roundup-tracker/roundup/builds/604758991