Catch an exception when adding/replacing a factoid.
Catch an exception when adding/replacing a factoid.

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