docs(tutorial): fix some minor punctuation errors

Closes angular#13633

Author: wytesk133

docs/content/tutorial/index.ngdoc

@@ -61,7 +61,7 @@ a few git commands.
 
 ### Install Git
 
-You can download and install Git from http://git-scm.com/download. Once installed you should have
+You can download and install Git from http://git-scm.com/download. Once installed, you should have
 access to the `git` command line tool.  The main commands that you will need to use are:
 
 - `git clone ...` : clone a remote repository onto your local machine
@@ -123,7 +123,7 @@ npm --version
   </a>.
 </div>
 
-Once you have Node.js installed on your machine you can download the tool dependencies by running:
+Once you have Node.js installed on your machine, you can download the tool dependencies by running:
 
 ```
 npm install
@@ -198,7 +198,7 @@ http://localhost:8000/app/index.html
 ```
 
 <div class="alert alert-info">
-To serve the web app on a different ip address or port, edit the "start" script within package.json.
+To serve the web app on a different IP address or port, edit the "start" script within package.json.
 You can use `-a` to set the address and `-p` to set the port.
 </div>
 

docs/content/tutorial/step_05.ngdoc

@@ -65,7 +65,7 @@ phonecatApp.controller('PhoneListCtrl', function ($scope, $http) {
 `$http` makes an HTTP GET request to our web server, asking for `phones/phones.json` (the url is
 relative to our `index.html` file). The server responds by providing the data in the json file.
 (The response might just as well have been dynamically generated by a backend server. To the
-browser and our app they both look the same. For the sake of simplicity we used a json file in this
+browser and our app, they both look the same. For the sake of simplicity, we used a json file in this
 tutorial.)
 
 The `$http` service returns a {@link ng.$q promise object} with a `success`
@@ -114,7 +114,7 @@ as strings, which will not get minified. There are two ways to provide these inj
 
 * Create a `$inject` property on the controller function which holds an array of strings.
   Each string in the array is the name of the service to inject for the corresponding parameter.
-  In our example we would write:
+  In our example, we would write:
 
   ```js
       function PhoneListCtrl($scope, $http) {...}