docs($compile,$route): reword "controller alias" to clarify

Clarify that these aliases are identifier names used to reference the controller.

Author: caitp

src/ng/compile.js

@@ -64,7 +64,7 @@
  *       templateNamespace: 'html',
  *       scope: false,
  *       controller: function($scope, $element, $attrs, $transclude, otherInjectables) { ... },
- *       controllerAs: 'stringAlias',
+ *       controllerAs: 'stringIdentifier',
  *       require: 'siblingDirectiveName', // or // ['^parentDirectiveName', '?optionalDirectiveName', '?^optionalParent'],
  *       compile: function compile(tElement, tAttrs, transclude) {
  *         return {
@@ -224,9 +224,10 @@
  *
  *
  * #### `controllerAs`
- * Controller alias at the directive scope. An alias for the controller so it
- * can be referenced at the directive template. The directive needs to define a scope for this
- * configuration to be used. Useful in the case when directive is used as component.
+ * Identifier name for a reference to the controller in the directive's scope.
+ * This allows the controller to be referenced from the directive template. The directive
+ * needs to define a scope for this configuration to be used. Useful in the case when
+ * directive is used as component.
  *
  *
  * #### `restrict`

src/ngRoute/route.js

@@ -73,8 +73,8 @@ function $RouteProvider() {
    *    - `controller` – `{(string|function()=}` – Controller fn that should be associated with
    *      newly created scope or the name of a {@link angular.Module#controller registered
    *      controller} if passed as a string.
-   *    - `controllerAs` – `{string=}` – A controller alias name. If present the controller will be
-   *      published to scope under the `controllerAs` name.
+   *    - `controllerAs` – `{string=}` – An identifier name for a reference to the controller.
+   *      If present, the controller will be published to scope under the `controllerAs` name.
    *    - `template` – `{string=|function()=}` – html template as a string or a function that
    *      returns an html template as a string which should be used by {@link
    *      ngRoute.directive:ngView ngView} or {@link ng.directive:ngInclude ngInclude} directives.