[DOCS] Merge pull request #20113 from tniezurawski/patch-1
[DOCS] Merge pull request #20113 from tniezurawski/patch-1

[DOCS] Application class: convert docs to ES6 syntax
tildeio/ember.js,sly7-7/ember.js,sly7-7/ember.js,emberjs/ember.js,tildeio/ember.js,tildeio/ember.js,emberjs/ember.js,sly7-7/ember.js,emberjs/ember.js