Improve Enumerable count/member? docs
Add exception formatting and colorization to iex
Don't use Regex module inside Exception, as it may not be available
Respond to review comments
Improve Error on bad_return from Application.Behaviour.Start
Prefix all warnings with [warning]

We expose :elixir_errors.warn/2 and :elixir_errors.warn/3
The first is to be used when we have detailed caller information,
such as from a stacktrace. The second is useful when our only
context is a line number and filename.

Note also that the test for module redfinition is performed in
helpers_test.exs rather than in warning_test.exs Perhaps this is
something that should be moved.
Remove Unix specific behaviour from File.cp/3 and File.cr_r/3

Previously those functions would behave as in their Unix counterpart
where copying behaved differently depending if the destination was
an existing directory or not. We have explicitly disallowed this
behaviour and added the proper notes to the docs.

Closes #2024.
Fix fixtures copying on mix tests
Remove unecessary lexical check in parser
Add `Version.valid_requirement?/1`
Fix test in previous commit
Lexer's valid_required? can now be private
Revert "Deprecate =~"

This reverts commit e42e3e55ca1561fe56b58d6f51c7b0faae6a7a1e.
Remove m/0 helper

The goal is to come up with a general
IEx module for runtime statistics.
No need to store environment in .compile.lock
Raise early on pipes into & special form
Merge branch 'issue-2022-warnings' of github.com:ShaneWilton/elixir into ShaneWilton-issue-2022-warnings

Conflicts:
	lib/elixir/test/elixir/kernel/warning_test.exs
	lib/iex/test/iex/helpers_test.exs
Deprecate Record.import/2

This is part of the preparation for maps.
Default build_per_environment to true
Update CHANGELOG