+ last_attempt

+ @@last_attempt_warning

+ last_attempt? method;
* send :last_attempt key if it is the last attempt

+ test for last attempt

* update test to make two asserts

* update message
Merge pull request #2687 from Lightpower/master

Warning of the last attempt password entering
* typo
Merge pull request #2689 from Lightpower/master

* typo
Update CHANGELOG [ci skip]
Prevent mutation of orig values during case and wspace sanitizations
Update code comment to keep it up to date

[#2691]
[ci skip]
Add entry to changelog

[#2691]
[ci skip]

Signed-off-by: José Valim <jose.valim@plataformatec.com.br>

Conflicts:
	CHANGELOG.md
Improve devise_for docs to be make routes integration more explicit
Merge branch 'master' into feature/last_attempt_message

Conflicts:
	config/locales/en.yml