Fixed #7839 -- Corrected admin documentation and tutorial to reflect that 'classes' should be a list and not a string. Thanks Jan Rademaker for the patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@7983 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/admin.txt

@@ -122,18 +122,12 @@ The ``field_options`` dictionary can have the following keys:
         }
 
 ``classes``
-    A string containing extra CSS classes to apply to the fieldset.
+    A list containing extra CSS classes to apply to the fieldset.
     
     Example::
         
         {
-        'classes': 'wide',
+        'classes': ['wide', 'extrapretty'],
-        }
-
-    Apply multiple classes by separating them with spaces. Example::
-        
-        {
-        'classes': 'wide extrapretty',
         }
 
     Two useful classes defined by the default admin-site stylesheet are

docs/tutorial02.txt

@@ -192,7 +192,7 @@ aren't commonly used::
         class PollAdmin(admin.ModelAdmin):
             fieldsets = [
                 (None,               {'fields': ['question']}),
-                ('Date information', {'fields': ['pub_date'], 'classes': 'pub_date'}),
+                ('Date information', {'fields': ['pub_date'], 'classes': ['pub_date']}),
             ]
 
 .. image:: http://media.djangoproject.com/img/doc/tutorial-trunk/admin09.png
@@ -242,7 +242,7 @@ registration code to read::
     class PollAdmin(admin.ModelAdmin):
         fieldsets = [
             (None,               {'fields': ['question']}),
-            ('Date information', {'fields': ['pub_date'], 'classes': 'pub_date'}),
+            ('Date information', {'fields': ['pub_date'], 'classes': ['pub_date']}),
         ]
         inlines = [ChoiceInline]