mhevery/angular.js — comment on commit 685ed76c2b82cd42e76dc4511bde04e050de3962
File: test/service/routeSpec.js line 401
By IgorMinar:

80 chars comes from the number of columns on a punch cards. So it was not pulled out of someones ass (at least not directly).

I actually don't care what the line width is as long as its more than 80, allows me to open two files side by side on my laptop @ 12px font size and is adhered to by all developers on the project.