running HMGET against a key with the set empty string '' by HMSET will return a nil value.

[mpg-kenzo-tanaka]

Thank you for the nice library.

running hmget against a key that set empty string '' by hmset will return a nil value.

# redis = Redis.new <redis host>, 6379

redis.hmset 'key', 'a', ''

a = redis.hmget 'key',  'a'
p a # => [nil]

running hget against the key return empty string ''.

a = redis.hget 'key',  'a'
p a # => ""

By redis-cli, running hmget or hget against the key return empty string ''.

redis:6379> hmset key a ""
""

redis:6379> hmget key a
1) ""

redis:6379> hget key a
""

Is this behavior intended?