plugins/RSS/test.py: Remove a comment that doesn't apply anymore and add a test for another encoding problem.
plugins/RSS/test.py: Remove a comment that doesn't apply anymore and add a test for another encoding problem.

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