docs($injector): fix typos

Author: ChrisRose

src/auto/injector.js

@@ -31,7 +31,7 @@
  *
  * Sometimes you want to get access to the injector of a currently running Angular app
  * from outside Angular. Perhaps, you want to inject and compile some markup after the
- * application has been bootstrapped. You can do this using extra `injector()` added
+ * application has been bootstrapped. You can do this using the extra `injector()` added
  * to JQuery/jqLite elements. See {@link angular.element}.
  *
  * *This is fairly rare but could be the case if a third party library is injecting the
@@ -163,7 +163,7 @@ function annotate(fn, strictDi, name) {
  * minification, and obfuscation tools since these tools change the argument names.
  *
  * ## `$inject` Annotation
- * By adding a `$inject` property onto a function the injection parameters can be specified.
+ * By adding an `$inject` property onto a function the injection parameters can be specified.
  *
  * ## Inline
  * As an array of injection names, where the last item in the array is the function to call.
@@ -200,7 +200,7 @@ function annotate(fn, strictDi, name) {
  * @name $injector#has
  *
  * @description
- * Allows the user to query if the particular service exist.
+ * Allows the user to query if the particular service exists.
  *
  * @param {string} Name of the service to query.
  * @returns {boolean} returns true if injector has given service.
@@ -210,8 +210,8 @@ function annotate(fn, strictDi, name) {
  * @ngdoc method
  * @name $injector#instantiate
  * @description
- * Create a new instance of JS type. The method takes a constructor function invokes the new
- * operator and supplies all of the arguments to the constructor function as specified by the
+ * Create a new instance of JS type. The method takes a constructor function, invokes the new
+ * operator, and supplies all of the arguments to the constructor function as specified by the
  * constructor annotation.
  *
  * @param {Function} Type Annotated constructor function.