'
+test_expect_success 'amend commit to fix date' '
+
+ test_tick &&
+ newtick=$GIT_AUTHOR_DATE &&
+ git reset --hard &&
+ git cat-file -p HEAD |
+ sed -e "s/author.*/author $author $newtick/" \
+ -e "s/^\(committer.*> \).*$/\1$GIT_COMMITTER_DATE/" > \
+ expected &&
+ git commit --amend --date="$newtick" &&
+ git cat-file -p HEAD > current &&
+ test_cmp expected current
+
+'
+
test_expect_success 'sign off (1)' '
echo 1 >positive &&