Fixed #11374 -- Modified the documentation for forms.BooleanField to allow for the fact that it can be rendered using widgets other than a checkbox. Thanks to lygaret for the patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@11236 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/ref/forms/fields.txt

@@ -275,7 +275,7 @@ For each field, we describe the default widget used if you don't specify
     * Default widget: ``CheckboxInput``
     * Empty value: ``False``
     * Normalizes to: A Python ``True`` or ``False`` value.
-    * Validates that the check box is checked (i.e. the value is ``True``) if
+    * Validates that the value is ``True`` (e.g. the check box is checked) if
       the field has ``required=True``.
     * Error message keys: ``required``
 
@@ -287,9 +287,10 @@ For each field, we describe the default widget used if you don't specify
 .. note::
 
     Since all ``Field`` subclasses have ``required=True`` by default, the
-    validation condition here is important. If you want to include a checkbox
-    in your form that can be either checked or unchecked, you must remember to
-    pass in ``required=False`` when creating the ``BooleanField``.
+    validation condition here is important. If you want to include a boolean
+    in your form that can be either ``True`` or ``False`` (e.g. a checked or
+    unchecked checkbox), you must remember to pass in ``required=False`` when
+    creating the ``BooleanField``.
 
 ``CharField``
 ~~~~~~~~~~~~~