git diff --check
'
+test_expect_success 'combined diff with autocrlf conversion' '
+
+ git reset --hard &&
+ echo >x hello &&
+ git commit -m "one side" x &&
+ git checkout HEAD^ &&
+ echo >x goodbye &&
+ git commit -m "the other side" x &&
+ git config core.autocrlf true &&
+ test_must_fail git merge master &&
+
+ git diff | sed -e "1,/^@@@/d" >actual &&
+ ! grep "^-" actual
+
+'
+
test_done