t/annotate-tests.sh: avoid passing a non-newline terminated file to sed
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 <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git