1. Enhancements

Elixir

• [Code] Add :emit_warnings for Code.string_to_quoted/2
• [File] Add :offset option to File.stream!/2
• [Kernel] Auto infer size of matched variable in bitstrings
• [Kernel] Preserve column information when translating typespecs
• [String] Add String.replace_invalid/2

Logger

• [Logger] Add Logger.levels/0

Mix

• [mix archive.install] Support --sparse option
• [mix compile.app] Warn if both :applications and :extra_applications are used
• [mix compile.elixir] Pass original exception down to diagnostic :details when possible
• [mix deps.clean] Emit a warning instead of crashing when a dependency cannot be removed
• [mix escript.install] Support --sparse option
• [mix release] Include include/ directory in releases

2. Bug fixes

Elixir

• [Code] Keep quotes for atom keys in formatter
• [Macro] Address exception on Macro.to_string/1 for certain ASTs
• [Module] Make sure file and position information is included in several module warnings (regression)
• [Path] Lazily evaluate File.cwd!/0 in Path.expand/1 and Path.absname/1

IEx

• [IEx.Pry] Fix prying functions with only literals in their body

Mix

• [mix archive.install] Restore code paths after archive.install
• [mix escript.install] Restore code paths after escript.install