Ignore the acks.html file, since it is generated.
diff --git a/Doc/html/.cvsignore b/Doc/html/.cvsignore
index 0807ec5..6ee09b1 100644
--- a/Doc/html/.cvsignore
+++ b/Doc/html/.cvsignore
@@ -7,6 +7,7 @@
 tut
 dist
 inst
+acks.html
 index.html
 modindex.html
 @webchecker.pickle