 * Fix Python 2.1 compatibility problem (string in string didn't work prior to 2.2).  * Fix querying by empty text fields combined with grouping.
 * Fix Python 2.1 compatibility problem (string in string didn't work prior to 2.2).
 * Fix querying by empty text fields combined with grouping.


git-svn-id: eda3d06fcef731589ace1b284159cead3416df9b@1163 af82e41b-90c4-0310-8c96-b1721e28e2e2

walty8/trac,jun66j5/trac-ja,walty8/trac,netjunki/trac-Pygit2,jun66j5/trac-ja,walty8/trac,netjunki/trac-Pygit2,walty8/trac,jun66j5/trac-ja,jun66j5/trac-ja,netjunki/trac-Pygit2