Add autoEscape option to FlashMessenger
Added tests for autoEscape via render()
Fixed error in test
Added third parameter to render() whether to use autoEscape
Updated render() docblock with the third parameter
Fixed rebase conflicts, added same functionality to renderCurrent and added tests
Merge pull request #5743 from Martin-P/issue-5600

Add auto escape method to Zend\View\Helper\FlashMessenger
[#5743] CS fix

- use `null ===` instead of `is_null` (consistency)
[#5743] object calisthenics

- Return from conditional, to remove an else clause
Merge branch 'feature/5743' into develop

Close #5743