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.