Fixed tests for all; added additional test cases for the empty sequence.
Fixed tests for all; added additional test cases for the empty sequence.

ProgVal/Limnoria-test,raboof/supybot,Ban3/Limnoria,jeffmahoney/supybot,kblin/supybot-gsoc,mazaclub/mazabot-core,prashantpawar/supybot-rothbot,buildbot/supybot,Ban3/Limnoria,ProgVal/Limnoria-test,mazaclub/mazabot-core,haxwithaxe/supybot,frumiousbandersnatch/supybot-code