Some implementations of 'echo' (e.g. dash's built-in) interpret
backslash sequences in their arguments.

This triggered at least one bug: the error message of "rebase -i" was
turning \t in commit messages into actual tabulations. There may be
others.

Using "printf '%s\n'" instead avoids this bad behavior, and is the form
used by the "say" function.

Noticed-by: David Kastrup <d...@gnu.org>
Signed-off-by: Matthieu Moy <matthieu....@imag.fr>
Signed-off-by: Junio C Hamano <gits...@pobox.com>
---
Changed the "grep" function to be more accurate. The test still
catches the old failure and pass after the fix.

 git-sh-setup.sh               |  2 +-
 t/t3404-rebase-interactive.sh | 13 +++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/git-sh-setup.sh b/git-sh-setup.sh
index 7a964ad..e15be51 100644
--- a/git-sh-setup.sh
+++ b/git-sh-setup.sh
@@ -53,7 +53,7 @@ die () {
 die_with_status () {
        status=$1
        shift
-       echo >&2 "$*"
+       printf >&2 '%s\n' "$*"
        exit "$status"
 }
 
diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh
index 49ccb38..4dbeddb 100755
--- a/t/t3404-rebase-interactive.sh
+++ b/t/t3404-rebase-interactive.sh
@@ -976,4 +976,17 @@ test_expect_success 'rebase -i with --strategy and -X' '
        test $(cat file1) = Z
 '
 
+test_expect_success 'rebase -i error on commits with \ in message' '
+       current_head=$(git rev-parse HEAD)
+       test_when_finished "git rebase --abort; git reset --hard $current_head; 
rm -f error" &&
+       test_commit TO-REMOVE will-conflict old-content &&
+       test_commit "\temp" will-conflict new-content dummy &&
+       (
+       EDITOR=true &&
+       export EDITOR &&
+       test_must_fail git rebase -i HEAD^ --onto HEAD^^ 2>error
+       ) &&
+       test_expect_code 1 grep  "      emp" error
+'
+
 test_done
-- 
1.8.3.3.797.gb72c616

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