Ip is giving single strings("1", "2") without dot as valid ipV6address.

ip.isV6Format("1") is returning true.

/^(::)?(((\d{1,3}\.){3}(\d{1,3}){1})?([0-9a-f]){0,4}:{0,2}){1,8}(::)?$/.test("1")
true

/^(::)?(((\d{1,3}\.){3}(\d{1,3}){1})?([0-9a-f]){0,4}:{0,2}){1,8}(::)?$/.test("12")
true

/^(::)?(((\d{1,3}\.){3}(\d{1,3}){1})?([0-9a-f]){0,4}:{0,2}){1,8}(::)?$/.test("123")
true

/^(::)?(((\d{1,3}\.){3}(\d{1,3}){1})?([0-9a-f]){0,4}:{0,2}){1,8}(::)?$/.test("1234")
true

Start at the implementation of ip.isV6Format and reproduce the reported results for "1", "12", "123", and "1234". Add regression coverage for these inputs and verify that single strings without a dot are rejected while valid IPv6 addresses continue to be accepted.

Written by the indexing model from the issue text.