elixir-lang/elixir — pull request #1984 by pminten (2014-01-11 13:51:05+00:00)
Title: Improve Enumerable count/member? docs

This avoids saying "pre-calculated" for `count?` (there might be a faster than linear algorithm that's not pre-calculated). Also be slightly more explicit about what happens if `{ :error, __MODULE__ }` is returned.