Fixed a whole bunch of small docs typos, errors, and ommissions.

Fixes #8358, #8396, #8724, #9043, #9128, #9247, #9267, #9267, #9375, #9409, #9414, #9416, #9446, #9454, #9464, #9503, #9518, #9533, #9657, #9658, #9683, #9733, #9771, #9835, #9836, #9837, #9897, #9906, #9912, #9945, #9986, #9992, #10055, #10084, #10091, #10145, #10245, #10257, #10309, #10358, #10359, #10424, #10426, #10508, #10531, #10551, #10635, #10637, #10656, #10658, #10690, #10699, #19528.

Thanks to all the respective authors of those tickets.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@10371 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/intro/tutorial03.txt

@@ -302,6 +302,13 @@ for a given poll. Here's the view::
 The new concept here: The view raises the :exc:`~django.http.Http404` exception
 if a poll with the requested ID doesn't exist.
 
+We'll discuss what you could put in that ``polls/detail.html`` template a bit
+later, but if you'd like to quickly get the above example working, just::
+
+    {{ poll }}
+    
+will get you started for now.
+
 A shortcut: get_object_or_404()
 -------------------------------
 
@@ -357,6 +364,10 @@ in ``django/conf/urls/defaults.py``, ``handler404`` is set to
 
 Three more things to note about 404 views:
 
+    * If :setting:`DEBUG` is set to ``True`` (in your settings module) then your
+      404 view will never be used (and thus the ``404.html`` template will never
+      be rendered) because the traceback will be displayed instead.
+
     * The 404 view is also called if Django doesn't find a match after checking
       every regular expression in the URLconf.
       
@@ -365,8 +376,9 @@ Three more things to note about 404 views:
       template in the root of your template directory. The default 404 view will
       use that template for all 404 errors.
       
-    * If :setting:`DEBUG` is set to ``True`` (in your settings module) then your
-      404 view will never be used, and the traceback will be displayed instead.
+    * If :setting:`DEBUG` is set to ``False`` (in your settings module) and if
+      you didn't create a ``404.html`` file, an ``Http500`` is raised instead.
+      So remember to create a ``404.html``.
 
 Write a 500 (server error) view
 ===============================