Re-add deprecated local tasks
Add a note about IO.bin*
Consider multiple @external_resource entries in mix
Add a note for binary_part/3 on String.slice/3
s/file/function in IO docs
Store stacktrace before invoking callback function
Fix bug when flat_map is used inside another flat_map with enumerable, closes #2483
Fixed Changelog typos
Merge pull request #2493 from jwarwick/changelog_typos

Fixed Changelog typos
Fix some sentence tenses in changelog
fix range typo
Merge pull request #2494 from jw2013/typo

fix typo in range moduledoc
Always return ok from tracking functions
Return explicit :ok from more functions
Ensure case wrapper in cond gets the proper line
throws error for missing docs in DocTest

Signed-off-by: José Valim <jose.valim@plataformatec.com.br>
Add test cases for ExUnit.DocTest failures
Fix regex compilation and set ucp flags
Check if ANSI escape codes are enabled on IEx's clear, closes #2441
Fix typo in GenEvent moduledoc