Added comment

ralsina · web-flow · commit d18726d75b9d · 2018-03-13T18:12:37.000-03:00
diff --git a/nikola/__main__.py b/nikola/__main__.py
@@ -234,6 +234,7 @@ def __init__(self, *args, **kw):
 class Clean(DoitClean):
     """Clean site, including the cache directory."""
 
+    # The unseemly *a is because this API changed between doit 0.30.1 and 0.31
     def clean_tasks(self, tasks, dryrun, *a):
         """Clean tasks."""
         if not dryrun and config:
