Fixed application_url() calls to use keyword arguments where the API

defines keyword arguments.

src/grok/ftests/url/application.py

@@ -13,7 +13,7 @@
   >>> browser.open('http://localhost/cave')
   >>> browser.contents
   'http://localhost/cave'
-  
+
 Asking for the application_url on the caveman returns the URL to the cave as
 well::
 
@@ -28,22 +28,33 @@
   >>> browser.contents
   'http://localhost/cave/second'
 
+URLs can be computed for skins too::
+
+  >>> browser.open('http://localhost/cave/caveman/third')
+  >>> browser.contents
+  'http://localhost/++skin++mammothskin/cave/third'
+
+  >>> browser.open('http://localhost/cave/caveman/fourth')
+  >>> browser.contents
+  'http://localhost/++skin++mammothskin/cave/fourth?key=value'
+
+
 application_url also works with empty containers::
 
   >>> from grok.ftests.url.application import Corridors
   >>> cave['corridors'] = Corridors()
   >>> browser.open('http://localhost/cave/corridors')
   >>> browser.contents
   'http://localhost/cave'
-  
+
 """
 import zope.interface
 import grok
+from zope.publisher.interfaces.browser import IDefaultBrowserLayer
 
 class IMarker(zope.interface.Interface):
     pass
 
-
 class Index(grok.View):
     grok.context(IMarker)
 
@@ -55,7 +66,7 @@ class Second(grok.View):
 
     def render(self):
         return self.application_url('second')
-    
+
 class Cave(grok.Application, grok.Container):
     grok.implements(IMarker)
 
@@ -64,3 +75,19 @@ class CaveMan(grok.Model):
 
 class Corridors(grok.Container):
     grok.implements(IMarker)
+
+class IMammothSkin(IDefaultBrowserLayer):
+    grok.skin('mammothskin')
+
+class Third(grok.View):
+    grok.context(IMarker)
+
+    def render(self):
+        return self.application_url('third', skin=IMammothSkin)
+
+class Fourth(grok.View):
+    grok.context(IMarker)
+
+    def render(self):
+        return self.application_url(
+            'fourth', skin=IMammothSkin, data={'key': 'value'})