t/annotate-tests.sh: avoid passing a non-newline terminated file to sed

Some versions of sed exit non-zero if the file they are supplied is not
newline terminated.  Solaris's /usr/xpg4/bin/sed is one such sed.  So
rework this test to avoid doing so.

This affects tests t8001-annotate.sh and t8002-blame.sh.

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

t/annotate-tests.sh

@@ -114,7 +114,10 @@ test_expect_success \
 test_expect_success \
     'some edit' \
     'mv file file.orig &&
-    sed -e "s/^3A/99/" -e "/^1A/d" -e "/^incomplete/d" < file.orig > file &&
+    {
+	cat file.orig &&
+	echo
+    } | sed -e "s/^3A/99/" -e "/^1A/d" -e "/^incomplete/d" > file &&
     echo "incomplete" | tr -d "\\012" >>file &&
     GIT_AUTHOR_NAME="D" git commit -a -m "edit"'