DDD and TDD re: new setting

docs/usage.rst

@@ -34,6 +34,12 @@ Specifically:
 
 * Create a Sphinx document named ``changelog.rst`` with a top-level header
   followed by a bulleted list.
+
+    * If you wish to use a different document name, use another config option
+      (as per previous bullet point), ``releases_document_name``. E.g.
+      ``releases_document_name = "CHANGES"`` would cause Releases to mutate a
+      file called ``CHANGES.rst`` instead of ``changelog.rst``.
+
 * List items are to be ordered chronologically with the newest ones on top.
 
     * As you fix issues, put them on the top of the list.

tests/changelog.py

@@ -522,5 +522,5 @@ class integration(Spec):
 
     def configurable_document_name(self):
         doc = _doctree('notchangelog')
-        generate_changelog(_app(), doc)
+        generate_changelog(_app(document_name='notchangelog'), doc)
         _assert_changlogged(doc)