[PATCH 4/4] mergetool: fix running in subdir when rerere enabled

If rerere is enabled and no pathnames are given, run cd_to_toplevel
before running 'git diff --name-only' so that 'git diff --name-only'
sees the pathnames emitted by 'git rerere remaining'.

Also run cd_to_toplevel before running 'git rerere remaining' in case
'git rerere remaining' is ever changed to print pathnames relative to
the current directory rather than to $GIT_WORK_TREE.

This fixes a regression introduced in
57937f70a09c12ef484c290865dac4066d207c9c (v2.11.0).

Signed-off-by: Richard Hansen <redacted>
---
 git-mergetool.sh     | 1 +
 t/t7610-mergetool.sh | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/git-mergetool.sh b/git-mergetool.sh
index e52b4e4f2..67ea0d6db 100755
--- a/git-mergetool.sh
+++ b/git-mergetool.sh

@@ -456,6 +456,7 @@ main () {
 
 	if test $# -eq 0 && test -e "$GIT_DIR/MERGE_RR"
 	then
+		cd_to_toplevel
 		set -- $(git rerere remaining)
 		if test $# -eq 0
 		then

diff --git a/t/t7610-mergetool.sh b/t/t7610-mergetool.sh
index e7b3e1866..1f7d63acb 100755
--- a/t/t7610-mergetool.sh
+++ b/t/t7610-mergetool.sh

@@ -200,7 +200,7 @@ test_expect_success 'mergetool merges all from subdir (rerere disabled)' '
 	)
 '
 
-test_expect_failure 'mergetool merges all from subdir (rerere enabled)' '
+test_expect_success 'mergetool merges all from subdir (rerere enabled)' '
 	git reset --hard &&
 	git checkout -b test$test_count branch1 &&
 	test_config rerere.enabled true &&

-- 
2.11.0.390.gc69c2f50cf-goog