# Produce test file containing three lines of the same config name/value pair separated
# by variations in one or more space characters which fall into the :blank: character class.
$ PORT=6379; echo -e "port ${PORT}\nport \t${PORT}\nport  \t ${PORT}" > redis.port.conf

# Test parse where a successful parse should extract the port number 3 times without extraneous spacing.

# FAIL
$  \grep "^port" /tmp/redis.port.conf  | tr -s "[:blank:]" | cut -d" " -f2
6379
        6379

# FAIL
$  \grep "^port" /tmp/redis.port.conf  | tr  "[:blank:]" " " | cut -d" " -f2
6379

$  \grep "^port" /tmp/redis.port.conf  | tr  "[:blank:]" " " |  tr -s "[:blank:]" | cut -d" " -f2
6379
6379
6379