 * 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: f68c6b3b1dcd5d00a2560c384475aaef3bc99487@1163 af82e41b-90c4-0310-8c96-b1721e28e2e2

dokipen/trac,exocad/exotrac,moreati/trac-gitsvn,dokipen/trac,exocad/exotrac,dafrito/trac-mirror,dokipen/trac,exocad/exotrac,moreati/trac-gitsvn,exocad/exotrac,dafrito/trac-mirror,moreati/trac-gitsvn,dafrito/trac-mirror,dafrito/trac-mirror,moreati/trac-gitsvn