Fixed the __str__ of some Value subclasses.
Fixed the __str__ of some Value subclasses.

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