I kept a list of the best things I read in 2012. This github commit was near the top of it...everything about it, from its technical insight to how spectacularly (in an attention-grabbig sense) it was executed, to how it spoke about the constant conflict between "read the documentation" and "save the developers from themselves"...fantastic.

I loved the commit from the future :) https://github.com/rails/rails/issues/5239