rebase -i: ignore patches that are already in the upstream

Non-interactive rebase had this from the beginning -- match it by
using --cherry-pick option to rev-list.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-rebase--interactive.sh

@@ -463,8 +463,9 @@ do
 #
 EOF
 		git rev-list $MERGES_OPTION --pretty=oneline --abbrev-commit \
-			--abbrev=7 --reverse $UPSTREAM..$HEAD | \
+			--abbrev=7 --reverse --left-right --cherry-pick \
-			sed "s/^/pick /" >> "$TODO"
+			$UPSTREAM...$HEAD | \
+			sed -n "s/^>/pick /p" >> "$TODO"
 
 		test -z "$(grep -ve '^$' -e '^#' < $TODO)" &&
 			die_abort "Nothing to do"

t/t3404-rebase-interactive.sh

@@ -68,6 +68,9 @@ test "\$1" = .git/COMMIT_EDITMSG && {
 	test -z "\$FAKE_COMMIT_AMEND" || echo "\$FAKE_COMMIT_AMEND" >> "\$1"
 	exit
 }
+test -z "\$EXPECT_COUNT" ||
+	test "\$EXPECT_COUNT" = \$(grep -ve "^#" -e "^$" < "\$1" | wc -l) ||
+	exit
 test -z "\$FAKE_LINES" && exit
 grep -v "^#" < "\$1" > "\$1".tmp
 rm "\$1"
@@ -251,4 +254,16 @@ test_expect_success 'interrupted squash works as expected' '
 	test $one = $(git rev-parse HEAD~2)
 '
 
+test_expect_success 'ignore patch if in upstream' '
+	HEAD=$(git rev-parse HEAD) &&
+	git checkout -b has-cherry-picked HEAD^ &&
+	echo unrelated > file7 &&
+	git add file7 &&
+	test_tick &&
+	git commit -m "unrelated change" &&
+	git cherry-pick $HEAD &&
+	EXPECT_COUNT=1 git rebase -i $HEAD &&
+	test $HEAD = $(git rev-parse HEAD^)
+'
+
 test_done