spelling: properly

Author: timeless@gmail.com

CHANGELOG.md

@@ -11940,7 +11940,7 @@ This release also contains all bug fixes available in [1.0.2](#1.0.2).
     ([06d09550](https://github.com/angular/angular.js/commit/06d0955074f79de553cc34fbf945045dc458e064))
   - **booleanAttrs:** always convert the model to boolean before setting the element property
     ([dcb8e076](https://github.com/angular/angular.js/commit/dcb8e0767fbf0a7a55f3b0045fd01b2532ea5441))
-  - **form:** preperly clean up when invalid widget is removed
+  - **form:** properly clean up when invalid widget is removed
     ([21b77ad5](https://github.com/angular/angular.js/commit/21b77ad5c231ab0e05eb89f22005f7ed8d40a6c1))
   - **ngHref:** copy even if no binding
     ([2f5dba48](https://github.com/angular/angular.js/commit/2f5dba488e855bcdbb9304aa809efcb9de7b43e9))