[PATCH 7/6] t0021: use $SHELL_PATH for the filter script

[Johannes Sixt <j6t@kdbg.org>]

On Windows, we need the shbang line to correctly invoke shell scripts via
a POSIX shell, except when the script is invoked via 'sh -c' because
sh (a bash) does "the right thing". Since nowadays the clean and smudge
filters are not always invoked via 'sh -c' anymore, we have to mark the
the one in t0021-conversion with #!$SHELL_PATH.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
---
  t/t0021-conversion.sh    |    3 ++-
  t/t4030-diff-textconv.sh |    6 ++++--
  2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/t/t0021-conversion.sh b/t/t0021-conversion.sh
index 8fc39d7..6cb8d60 100755
--- a/t/t0021-conversion.sh
+++ b/t/t0021-conversion.sh
@@ -4,7 +4,8 @@ test_description='blob conversion via gitattributes'

  . ./test-lib.sh

-cat <<\EOF >rot13.sh
+cat <<EOF >rot13.sh
+#!$SHELL_PATH
  tr \
    'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' \
    'nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM'
diff --git a/t/t4030-diff-textconv.sh b/t/t4030-diff-textconv.sh
index c16d538..3cb7e63 100755
--- a/t/t4030-diff-textconv.sh
+++ b/t/t4030-diff-textconv.sh
@@ -19,10 +19,12 @@ cat >expect.text <<'EOF'
  +1
  EOF

-cat >hexdump <<'EOF'
-#!/bin/sh
+{
+	echo "#!$SHELL_PATH"
+	cat <<'EOF'
  perl -e '$/ = undef; $_ = <>; s/./ord($&)/ge; print $_' < "$1"
  EOF
+} >hexdump
  chmod +x hexdump

  test_expect_success 'setup binary file with history' '
-- 
1.6.6.1073.gd853b.dirty