Documentation: AsciiDoc spells em-dash as double-dashes, not triple

Again, we do not usually process release notes with AsciiDoc, but it
is better to be consistent.

This incidentally reveals breakages left by an ancient 5e00439f
(Documentation: build html for all files in technical and howto,
2012-10-23).  The index-format documentation was originally written
to be read as straight text without formatting and when the commit
forced everything in Documentation/ to go through AsciiDoc, it did
not do any adjustment--hence the double-dashes will be seen in the
resulting text that is rendered as preformatted fixed-width without
converted into em-dashes.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/Documentation/RelNotes/1.9.0.txt b/Documentation/RelNotes/1.9.0.txt
index 752d79127..4e4b88aa5 100644
--- a/Documentation/RelNotes/1.9.0.txt
+++ b/Documentation/RelNotes/1.9.0.txt
@@ -177,7 +177,7 @@ Performance, Internal Implementation, etc.
  * The naming convention of the packfiles has been updated; it used to
    be based on the enumeration of names of the objects that are
    contained in the pack, but now it also depends on how the packed
-   result is represented---packing the same set of objects using
+   result is represented--packing the same set of objects using
    different settings (or delta order) would produce a pack with
    different name.