wtf? ```` are rendered differently on local jekyll vs. github.io.

I'll try four spaces, in https://raw.github.com/roidrage/paperplanes/master/_posts/2007-12-6-a_weird_ruby_bug.markdown
they seemed to result in correct behavior (as in
http://www.paperplanes.de/2007/12/6/a_weird_ruby_bug.html).