Fixed #25751 -- Doc'd how to use JavaScriptCatalog with i18n_patterns().

docs/topics/i18n/translation.txt

@@ -1028,6 +1028,18 @@ The ``JavaScriptCatalog`` view
                 name='javascript-catalog'),
         ]
 
+    If your root URLconf uses :func:`~django.conf.urls.i18n.i18n_patterns`,
+    ``JavaScriptCatalog`` must also be wrapped by ``i18n_patterns()`` for the
+    catalog to be correctly generated.
+
+    **Example with** ``i18n_patterns()``::
+
+        from django.conf.urls.i18n import i18n_patterns
+
+        urlpatterns = i18n_patterns(
+            url(r'^jsi18n/$', JavaScriptCatalog.as_view(), name='javascript-catalog'),
+        )
+
 The precedence of translations is such that the packages appearing later in the
 ``packages`` argument have higher precedence than the ones appearing at the
 beginning. This is important in the case of clashing translations for the same