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
WIP
WIP
Fix decode
WIP