Capitalize "API"

docs/content/tutorial/step_03.ngdoc

@@ -150,7 +150,7 @@ and title elements:
 
   Be sure to *remove* the `ng-controller` declaration from the body element.
 
-  While using double curlies works fine in within the title element, you might have noticed that
+  While using double curlies works fine within the title element, you might have noticed that
 for a split second they are actually displayed to the user while the page is loading. A better
 solution would be to use the {@link api/ng.directive:ngBind
 ngBind} or {@link api/ng.directive:ngBindTemplate

docs/content/tutorial/step_07.ngdoc

@@ -56,9 +56,9 @@ module definitions. The sole responsibilities of the injector are to load specif
 definition(s), register all service providers defined in these modules and when asked inject
 a specified function with dependencies (services) that it lazily instantiates via their providers.
 
-Providers are objects that provide (create) instances of services and expose configuration apis
+Providers are objects that provide (create) instances of services and expose configuration APIs
 that can be used to control the creation and runtime behavior of a service. In case of the `$route`
-service, the `$routeProvider` exposes apis that allow you to define routes for your application.
+service, the `$routeProvider` exposes APIs that allow you to define routes for your application.
 
 Angular modules solve the problem of removing global state from the application and provide a way
 of configuring the injector. As opposed to AMD or require.js modules, Angular modules don't try to
@@ -79,8 +79,8 @@ angular.module('phonecat', []).
 </pre>
 
 In order to configure our application with routes, we need to create a module for our application.
-We call this module `phonecatApp` and using the `config` api we request the `$routeProvider` to be
-injected into our config function and use `$routeProvider.when` api to define our routes.
+We call this module `phonecatApp` and using the `config` API we request the `$routeProvider` to be
+injected into our config function and use `$routeProvider.when` API to define our routes.
 
 Note that during the injector configuration phase, the providers can be injected as well, but they
 will not be available for injection once the injector is created and starts creating service