JuliaLang/julia — pull request #4864 by StefanKarpinski (2013-11-20 16:03:06+00:00)
Title: WIP – tau: add MathConst{:τ}

There's an issue with code evaluation order here. Maybe I need a toplevel block or something like that. Anyway, thought I'd throw this out there for comment before spending any more time on it. Do we want `τ` and `tau`?