Minor tutorial updates

docs/tutorial/5-relationships-and-hyperlinked-apis.md

@@ -18,7 +18,7 @@ Right now we have endpoints for 'snippets' and 'users', but we don't have a sing
             'snippets': reverse('snippet-list', request=request, format=format)
         })
 
-Two things should be noticed here. First, we're using REST framework's `reverse` function in order to return fully-qualified URLs; second, URL patterns are identified by convenience names that we will declare later on in our `snippets/urls.py`. 
+Two things should be noticed here. First, we're using REST framework's `reverse` function in order to return fully-qualified URLs; second, URL patterns are identified by convenience names that we will declare later on in our `snippets/urls.py`.
 
 ## Creating an endpoint for the highlighted snippets
 
@@ -80,7 +80,7 @@ We can easily re-write our existing serializers to use hyperlinking. In your `sn
 
         class Meta:
             model = Snippet
-            fields = ('url', 'highlight', 'owner',
+            fields = ('url', 'pk', 'highlight', 'owner',
                       'title', 'code', 'linenos', 'language', 'style')
 
 
@@ -89,7 +89,7 @@ We can easily re-write our existing serializers to use hyperlinking. In your `sn
 
         class Meta:
             model = User
-            fields = ('url', 'username', 'snippets')
+            fields = ('url', 'pk', 'username', 'snippets')
 
 Notice that we've also added a new `'highlight'` field.  This field is of the same type as the `url` field, except that it points to the `'snippet-highlight'` url pattern, instead of the `'snippet-detail'` url pattern.
 

docs/tutorial/7-schemas-and-client-libraries.md

@@ -67,9 +67,13 @@ also supported.
 
 Now that our API is exposing a schema endpoint, we can use a dynamic client
 library to interact with the API. To demonstrate this, let's use the
-Core API command line client. We've already installed the `coreapi` package
-using `pip`, so the client tool should already be installed. Check that it
-is available on the command line...
+Core API command line client.
+
+The command line client is available as the `coreapi-cli` package:
+
+    $ pip install coreapi-cli
+
+Now check that it is available on the command line...
 
     $ coreapi
     Usage: coreapi [OPTIONS] COMMAND [ARGS]...
@@ -108,6 +112,7 @@ Let's try listing the existing snippets, using the command line client:
     [
         {
             "url": "http://127.0.0.1:8000/snippets/1/",
+            "pk": 1,
             "highlight": "http://127.0.0.1:8000/snippets/1/highlight/",
             "owner": "lucy",
             "title": "Example",
@@ -166,7 +171,7 @@ snippet:
     $ coreapi action snippets create --param title "Example" --param code "print('hello, world')"
     {
         "url": "http://127.0.0.1:8000/snippets/7/",
-        "id": 7,
+        "pk": 7,
         "highlight": "http://127.0.0.1:8000/snippets/7/highlight/",
         "owner": "lucy",
         "title": "Example",