calebsmith/vim-lambdify — pull request #3 by k3rni (2014-10-10 10:48:34+00:00)
Title: Ruby: conceal 'lambda', 'proc' and 1.9 dagger lambda '->'

While there are certain [semantic differences](http://stackoverflow.com/questions/1740046/whats-the-difference-between-a-proc-and-a-lambda-in-ruby) between them, I think it's valid to replace all of them with the lambda character.