[1.6.x] A couple more semicolon -> colon fixes; refs #18134.

Backport of 3632d289de from master.

docs/ref/forms/api.txt

@@ -661,7 +661,7 @@ additional attributes for the ``<label>`` tag.
 .. versionchanged:: 1.6
 
     The label now includes the form's :attr:`~django.forms.Form.label_suffix`
-    (a semicolon, by default).
+    (a colon, by default).
 
 .. method:: BoundField.css_classes()
 

docs/releases/1.6.txt

@@ -634,10 +634,10 @@ If you manually render ``label_tag`` in your templates:
 
     {{ form.my_field.label_tag }}: {{ form.my_field }}
 
-you'll want to remove the semicolon (or whatever other separator you may be
+you'll want to remove the colon (or whatever other separator you may be
 using) to avoid duplicating it when upgrading to Django 1.6. The following
 template in Django 1.6 will render identically to the above template in Django
-1.5, except that the semicolon will appear inside the ``<label>`` element.
+1.5, except that the colon will appear inside the ``<label>`` element.
 
 .. code-block:: html+django
 

docs/topics/forms/index.txt

@@ -321,7 +321,7 @@ attributes, which can be useful in your templates:
     .. versionchanged:: 1.6
 
         This includes the form's :attr:`~django.forms.Form.label_suffix`. For
-        example, the default ``label_suffix`` is a semicolon::
+        example, the default ``label_suffix`` is a colon::
 
             <label for="id_email">Email address:</label>