#### Rely on sendmail/pipe below to override default mts.
mts_fakesendmail="${MHMTSCONF}-fakesendmail"
cp "${MHMTSCONF}" "$mts_fakesendmail"
-printf "sendmail: ${srcdir}/test/fakesendmail\n" >>"$mts_fakesendmail"
+printf 'sendmail: %s/test/fakesendmail\n' "$srcdir" >>"$mts_fakesendmail"
MHMTSCONF="$mts_fakesendmail"
# argument: expected output