fix typo in `mix help new`
Merge pull request #2395 from pwoolcoc/mix-help-new-typo

fix typo in `mix help new`
Do not allow underscores in option names. Closes #2391
Make test and test cases exit with reason :shutdown

This guarantees OTP processes are properly shutdown when
the test finishes.
Merge pull request #2397 from alco/option-parser-fix

Do not allow underscores in option names. Closes #2391
Disambiguate (w)erl to (w)erl.exe
Merge pull request #2399 from chyndman/win-disambiguate-exe

Disambiguate (w)erl to (w)erl.exe
Fix a typo in Kernel docs
Merge pull request #2400 from alco/patch-3

Fix a typo in Kernel docs
Do not warn on case template teardown/teardown_all definition
Introduce `URI.encode_www_form/1` function
Fix edge cases for `URI.decode/1`
Introduce `URI.decode_www_form/1` function
Merge pull request #2402 from lexmag/encode-www-form

Introduce `URI.encode(decode)_www_form/2` functions
Log when tasks go down
Update CHANGELOG
Fix path normalization of "/.."

Closes #2404.
Rely on print_app for mix deps.compile and ensure path deps are compiled
Ensure umbrella is recompiled when a child dependency changes
Ensure we can measure a timestamp difference on tests