t9001-send-email: move script creation in a setup test

Move the creation of the scripts used in to-cmd and cc-cmd tests
in a setup test to make them available for later tests.

Signed-off-by: Remi Lespinet <remi.lespinet@ensimag.grenoble-inp.fr>
Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t9001-send-email.sh

@@ -312,13 +312,19 @@ test_expect_success $PREREQ,!AUTOIDENT 'broken implicit ident aborts send-email'
 	)
 '
 
+test_expect_success $PREREQ 'setup tocmd and cccmd scripts' '
+	write_script tocmd-sed <<-\EOF &&
+	sed -n -e "s/^tocmd--//p" "$1"
+	EOF
+	write_script cccmd-sed <<-\EOF
+	sed -n -e "s/^cccmd--//p" "$1"
+	EOF
+'
+
 test_expect_success $PREREQ 'tocmd works' '
 	clean_fake_sendmail &&
 	cp $patches tocmd.patch &&
 	echo tocmd--tocmd@example.com >>tocmd.patch &&
-	write_script tocmd-sed <<-\EOF &&
-	sed -n -e "s/^tocmd--//p" "$1"
-	EOF
 	git send-email \
 		--from="Example <nobody@example.com>" \
 		--to-cmd=./tocmd-sed \
@@ -332,9 +338,6 @@ test_expect_success $PREREQ 'cccmd works' '
 	clean_fake_sendmail &&
 	cp $patches cccmd.patch &&
 	echo "cccmd--  cccmd@example.com" >>cccmd.patch &&
-	write_script cccmd-sed <<-\EOF &&
-	sed -n -e "s/^cccmd--//p" "$1"
-	EOF
 	git send-email \
 		--from="Example <nobody@example.com>" \
 		--to=nobody@example.com \