Change xdl_merge to generate output even for null merges

diff --git a/t/t4200-rerere.sh b/t/t4200-rerere.sh
index cf10557dd277cbd221c69fb42add15e956c1793b..b68ab11f2915789cd04ac6bd43363aeab2079198 100755 (executable)
--- a/t/t4200-rerere.sh
+++ b/t/t4200-rerere.sh
@@ -45,7 +45,7 @@ git commit -q -a -m second
 
 test_expect_success 'nothing recorded without rerere' '
        (rm -rf .git/rr-cache; git config rerere.enabled false) &&
-       ! git merge first &&
+       test_must_fail git merge first &&
        ! test -d .git/rr-cache
 '
 
@@ -54,10 +54,10 @@ test_expect_success 'conflicting merge' '
        git reset --hard &&
        mkdir .git/rr-cache &&
        git config --unset rerere.enabled &&
-       ! git merge first
+       test_must_fail git merge first
 '
 
-sha1=$(sed -e 's/      .*//' .git/rr-cache/MERGE_RR)
+sha1=$(sed -e 's/      .*//' .git/MERGE_RR)
 rr=.git/rr-cache/$sha1
 test_expect_success 'recorded preimage' "grep ^=======$ $rr/preimage"
 
@@ -65,7 +65,7 @@ test_expect_success 'rerere.enabled works, too' '
        rm -rf .git/rr-cache &&
        git config rerere.enabled true &&
        git reset --hard &&
-       ! git merge first &&
+       test_must_fail git merge first &&
        grep ^=======$ $rr/preimage
 '
 
@@ -134,7 +134,7 @@ test_expect_success 'another conflicting merge' '
        git checkout -b third master &&
        git show second^:a1 | sed "s/To die: t/To die! T/" > a1 &&
        git commit -q -a -m third &&
-       ! git pull . first
+       test_must_fail git pull . first
 '
 
 git show first:a1 | sed 's/To die: t/To die! T/' > expect
@@ -143,7 +143,7 @@ test_expect_success 'rerere kicked in' "! grep ^=======$ a1"
 test_expect_success 'rerere prefers first change' 'test_cmp a1 expect'
 
 rm $rr/postimage
-echo "$sha1    a1" | perl -pe 'y/\012/\000/' > .git/rr-cache/MERGE_RR
+echo "$sha1    a1" | perl -pe 'y/\012/\000/' > .git/MERGE_RR
 
 test_expect_success 'rerere clear' 'git rerere clear'
 
@@ -189,8 +189,8 @@ test_expect_success 'file2 added differently in two branches' '
        echo Bello > file2 &&
        git add file2 &&
        git commit -m version2 &&
-       ! git merge fourth &&
-       sha1=$(sed -e "s/       .*//" .git/rr-cache/MERGE_RR) &&
+       test_must_fail git merge fourth &&
+       sha1=$(sed -e "s/       .*//" .git/MERGE_RR) &&
        rr=.git/rr-cache/$sha1 &&
        echo Cello > file2 &&
        git add file2 &&