Fix pretty permalink example
Fix pretty permalink example

Following what the documentation specify above for the pretty permalink format (`/:categories/:year/:month/:day/:title/`), it should result for the example to `/2009/04/29/slap-chop/` and not `/2009/04/29/slap-chop/index.html`. Well, at least if I've understood correctly ;-)
chrisfinazzo/jekyll,alfredxing/jekyll,Strangehill/jekyll,stomar/jekyll,pmarsceill/jekyll,LeuisKen/jekyllcn,alex-kovac/jekyll,fulldecent/jekyll,gencer/jekyll,ryanshaw/jekyll,jaybe-jekyll/jekyll,brint/jekyll,darwin/jekyll,yhironaka/yhironaka.github.io,tomjohnson1492/jekyll,yihangho/jekyll,alfredxing/jekyll,ducktyper/jekyll,ZDroid/jekyll,zsyed91/jekyll,gencer/jekyll,gencer/jekyll,fulldecent/jekyll,ducktyper/jekyll,tillgrallert/jekyll,floydpraveen/jekyll,brint/jekyll,noikiy/jekyll,rebornix/jekyll,tillgrallert/jekyll,alex-kovac/jekyll,mrb/jekyll,alex-kovac/jekyll,rebornix/jekyll,xcatliu/jekyllcn,floydpraveen/jekyll,alfredxing/jekyll,Strangehill/jekyll,floydpraveen/jekyll,rlugojr/jekyll,Strangehill/jekyll,aarvay/jekyll,xcatliu/jekyllcn,ZDroid/jekyll,tomjohnson1492/jekyll,tomjohnson1492/jekyll,brint/jekyll,jaybe-jekyll/jekyll,x-way/jekyll,nasht00/jekyll,Strangehill/jekyll,xcatliu/jekyllcn,chrisfinazzo/jekyll,ajhit406/jekyll,tomjohnson1492/jekyll,stomar/jekyll,jekyll/jekyll,ZDroid/jekyll,gencer/jekyll,Kinghack/kinghack.github.com,xiebinhqy/jklly_china,bsmr-ruby/jekyll,tillgrallert/jekyll,bsmr-ruby/jekyll,princeofdarkness76/jekyll,alfredxing/jekyll,tillgrallert/jekyll,ducktyper/jekyll,getandpost/jekyll.github.io,ryanshaw/jekyll,jekyll/jekyll,fulldecent/jekyll,derekgottlieb/jekyll,mrb/jekyll,zsyed91/jekyll,x-way/jekyll,rlugojr/jekyll,bsmr-ruby/jekyll,darwin/jekyll,jekyll/jekyll,ajhit406/jekyll,rebornix/jekyll,bsmr-ruby/jekyll,alex-kovac/jekyll,noikiy/jekyll,mrb/jekyll,aarvay/jekyll,xiebinhqy/jklly_china,floydpraveen/jekyll,jeffkole/jekyll,Kinghack/kinghack.github.com,darwin/jekyll,pmarsceill/jekyll,jeffkole/jekyll,jekyll/jekyll,mrb/jekyll,yihangho/jekyll,derekgottlieb/jekyll,Kinghack/kinghack.github.com,jeffkole/jekyll,noikiy/jekyll,chrisfinazzo/jekyll,darwin/jekyll,codeclimate-testing/jekyll,nasht00/jekyll,pmarsceill/jekyll,jeffkole/jekyll,ajhit406/jekyll,fulldecent/jekyll,x-way/jekyll,LeuisKen/jekyllcn,xcatliu/jekyllcn,rasa2011/rasa2011.github.io,tomjohnson1492/jekyll,alex-kovac/jekyll,ajhit406/jekyll,nasht00/jekyll,chrisfinazzo/jekyll,tillgrallert/jekyll,x-way/jekyll,jaybe-jekyll/jekyll,codeclimate-testing/jekyll,brint/jekyll,rlugojr/jekyll,zsyed91/jekyll,rasa2011/rasa2011.github.io,princeofdarkness76/jekyll,yihangho/jekyll,rasa2011/rasa2011.github.io,xiebinhqy/jklly_china,derekgottlieb/jekyll,Strangehill/jekyll,gencer/jekyll,xiebinhqy/jklly_china,zsyed91/jekyll,aarvay/jekyll,princeofdarkness76/jekyll,larryfox/jekyll,codeclimate-testing/jekyll,larryfox/jekyll,ryanshaw/jekyll,getandpost/jekyll.github.io,jaybe-jekyll/jekyll,LeuisKen/jekyllcn,princeofdarkness76/jekyll,stomar/jekyll,pmarsceill/jekyll,larryfox/jekyll,rlugojr/jekyll,getandpost/jekyll.github.io,ryanshaw/jekyll,derekgottlieb/jekyll,stomar/jekyll,nasht00/jekyll,noikiy/jekyll