[1.6.x] Misc doc cleanups.

Backport of 70c080f from master

docs/ref/forms/widgets.txt

@@ -52,8 +52,7 @@ widget on the field. In the following example, the
 :attr:`~django.forms.extras.widgets.SelectDateWidget.years` attribute is set
 for a :class:`~django.forms.extras.widgets.SelectDateWidget`::
 
-    from django.forms.fields import DateField, ChoiceField, MultipleChoiceField
-    from django.forms.widgets import RadioSelect, CheckboxSelectMultiple
+    from django import forms
     from django.forms.extras.widgets import SelectDateWidget
 
     BIRTH_YEAR_CHOICES = ('1980', '1981', '1982')
@@ -62,9 +61,9 @@ for a :class:`~django.forms.extras.widgets.SelectDateWidget`::
                                 ('black', 'Black'))
 
     class SimpleForm(forms.Form):
-        birth_year = DateField(widget=SelectDateWidget(years=BIRTH_YEAR_CHOICES))
+        birth_year = forms.DateField(widget=SelectDateWidget(years=BIRTH_YEAR_CHOICES))
         favorite_colors = forms.MultipleChoiceField(required=False,
-            widget=CheckboxSelectMultiple, choices=FAVORITE_COLORS_CHOICES)
+            widget=forms.CheckboxSelectMultiple, choices=FAVORITE_COLORS_CHOICES)
 
 See the :ref:`built-in widgets` for more information about which widgets
 are available and which arguments they accept.

docs/topics/templates.txt

@@ -45,7 +45,9 @@ A template contains **variables**, which get replaced with values when the
 template is evaluated, and **tags**, which control the logic of the template.
 
 Below is a minimal template that illustrates a few basics. Each element will be
-explained later in this document.::
+explained later in this document.
+
+.. code-block:: html+django
 
     {% extends "base_generic.html" %}