v2: mirrors don't clobber msgs w/ reused Message-IDs

For odd messages with reused Message-IDs, the second message
showing up in a mirror (via git-fetch + -index) should never
clobber an entry with a different blob in over.

This is noticeable only if the messages arrive in-between
indexing runs.

Fixes: 4441a38481ed ("v2: index forwards (via `git log --reverse')")

1 files changed, 1 insertions, 0 deletions

diff --git a/MANIFEST b/MANIFEST
index b5aae777..af1522d7 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -552,6 +552,7 @@ t/v1-add-remove-add.t
 t/v1reindex.t
 t/v2-add-remove-add.t
 t/v2dupindex.t
+t/v2index-late-dupe.t
 t/v2mda.t
 t/v2mirror.t
 t/v2reindex.t