v2: one file, really

We need to ensure there is only one file in the top-level tree
at any commit so the "add; remove; add;" sequence on the same
message is detected properly.

Otherwise, git will not detect the second "add" unless
a second message is added to history.

Deletes are now stored in "d" (and not "D" or "_/D") at the
top-level, now.  There's no need to have a "_" to reduce churn
as "m" and "d" should never co-exist.  It's now lowercased to
make it easier-to-distinguish from "D" in git-log output.

1 files changed, 1 insertions, 0 deletions

diff --git a/MANIFEST b/MANIFEST
index 4a1096d6..60e15f28 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -187,6 +187,7 @@ t/thread-all.t
 t/thread-cycle.t
 t/time.t
 t/utf8.mbox
+t/v2-add-remove-add.t
 t/v2mda.t
 t/v2reindex.t
 t/v2writable.t