shelltestrunner-1.9: tests/format3.unix/unicode-unix.test

# 0. utf8-encoded unicode in filename should be fine
# XXX file renamed from unicode-ß-unix.test to appease hackage (non-utf8-encoded ?)
#
# 1. in command field:
$  echo проверка
> //

# 2. in output field:
$  echo проверка
проверка

# 3. in regexp:
$  echo проверка
> /проверка/