Although I think women are far more likely to think of other women as bitches than males (at least among the gentlemen of European descent). I.e. males will slap this label around, but women actually mean it.
[ExUnit] Add on_exit/1 callbacks that are guaranteed to run once the test process exits and always in another process
[Kernel] Store documentation in the abstract code to avoid loading them when the module is loaded
[Kernel] Add get_in/2, put_in/3, update_in/3 and get_and_update_in/3 to handle nested data structure operations
[Kernel] Add get_in/1, put_in/2, update_in/2 and get_and_update_in/2 to handle nested data structure operations via paths
[Mix] Add Mix.Config to ease definition of configuration files
[Mix] Add mix loadconfig task that can be called multiple times to load external configs
[Mix] Support --config option on mix run
[Mix] Support HTTP_PROXY and HTTPS_PROXY on Mix url commands
[Mix] Support --names options in mix help which emit only names (useful for autocompletion)
[Protocol] Add Protocol.consolidate/2, Protocol.consolidated?/1 and a mix compile.protocols task for protocol consolidation
[Protocol] Add Protocol.derive/3 for runtime deriving of a struct
[String] Add String.chunk/2
[Struct] Add support for @derive before defstruct/2 definitions
Bug fixes
[File] File.rm now consistently deletes read-only across operating systems
[Kernel] Ensure Mix _build structure works on Windows when copying projects
[Kernel] Ensure 1.0E10 (with uppercase E) is also valid syntax
[Mix] Fix mix do task for Windows' powershell users
[Path] Fix Path.absname("/") and Path.expand("/") to return the absolute path "/".
Soft deprecations (no warnings emitted)
[Kernel] size/1 is deprecated, please use byte_size/1 or tuple_size/1 instead
[ExUnit] teardown/2 and teardown_all/2 are deprecated in favor of on_exit/1 callbacks
Deprecations
[Access] Access.access/2 is deprecated in favor of Access.get/2
[Dict] Dict.Behaviour is deprecated in favor of Dict
[Kernel] Application.Behaviour, GenEvent.Behaviour, GenServer.Behaviour and Supervisor.Behaviour are deprecated in favor of Application, GenEvent, GenServer and Supervisor
[Kernel] defexception/3 is deprecated in favor of defexception/1
[Kernel] raise/3 is deprecated in favor of reraise/2
[Kernel] set_elem/3 is deprecated in favor of put_elem/3
[Kernel] Passing an atom var!/1 is deprecated, variables can be built dynamically with Macro.var/2
[Mix] Exceptions that define a :mix_error field to be compatible with Mix are no longer supported. Instead please provide a :mix field and use Mix.raise/1 and Mix.raise/2
Backwards incompatible changes
[Access] Kernel.access/2 no longer exists and the Access protocol now requires get/2 (instead of access/2) and get_and_update/3 to be implemented
[Kernel] Retrieving docs as module.__info__(:docs) is no longer supported, please use Code.get_docs/2 instead
[Kernel] Code.compiler_options/1 no longer accepts custom options, only the ones specified by Elixir (use mix config instead)
[Mix] mix new no longer generates a supevision tree by default, please pass --sup instead
[Task] Tasks are automatically linked to callers and a failure in the task will crash the caller directly