brighterplanet/numbers — comment on commit 957488f291ce738a6fe2bd2f9011f521e7020a09
File: _posts/2012-02-29-beware-of-string-hash-being-used-for-cache-keys.markdown line 10
By rossmeissl:

this should say `{% highlight irb %}` and you should omit the initial `$ irb`

If you really want the initial `$ irb` you could do two separate fenced code blocks, one with `console` and the other with `irb`