1 if (FOO=FOO; unset FOO) >/dev/null 2>&1; then
7 $as_unset VERSION_CONTROL SIMPLE_BACKUP_SUFFIX
9 if test "${VERSION_CONTROL+set}" = set; then
10 echo "$0: the VERSION_CONTROL envvar is set --" \
11 ' unset it and rerun this test' >&2
15 if test "${SIMPLE_BACKUP_SUFFIX+set}" = set; then
16 echo "$0: the SIMPLE_BACKUP_SUFFIX envvar is set --" \
17 ' unset it and rerun this test' >&2