t9129-git-svn-i18n-commitencoding: Make compare_svn_head_with() compatible with OSX sed

The sed call used in compare_svn_head_with() uses the + quantifier, which
is not supported in the OSX version of sed. It is replaced by the
equivalent \{1,\}.

Signed-off-by: Marcel Koeppen <git-dev@marzelpan.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t9129-git-svn-i18n-commitencoding.sh

@@ -16,7 +16,7 @@ compare_git_head_with () {
 
 compare_svn_head_with () {
 	LC_ALL=en_US.UTF-8 svn log --limit 1 `git svn info --url` | \
-		sed -e 1,3d -e "/^-\+\$/d" >current &&
+		sed -e 1,3d -e "/^-\{1,\}\$/d" >current &&
 	test_cmp current "$1"
 }