Ember testing update url in visit helper
Merge pull request #2627 from teddyzeenny/visit-url

Ember testing update url in visit helper
Fix language type
Fix value type

These methods treat `Number` value.
Fix argument name

`decrementProperty` should receive argument as `decrement`.
Fix code comment at `Ember.TextField`

This property is `onEvent`.
Merge pull request #2629 from tricknotes/fix-typo-in-code-comment

Fix typos in code comment