Rfc1918ClassBPrivateSpec incorrect matches

[improved-broccoli]

Rfc1918ClassBPrivateSpec matches IPs out of RFC range.
For example, 172.222.171.197 will match.
This is caused by a missing escaping backslash before the latest dot in the regex.
Actually, the regex is ^172\.(15|16|17|18|19|20|21|22|23|24|25|26|27|28|29|30|31).+, the latest dot is considered as a wildcard character because not escaped, so any IP with a second digit starting with characters 15 to 31 will match.

Adding a backslash before, solve the issue: ^172\.(15|16|17|18|19|20|21|22|23|24|25|26|27|28|29|30|31)\.+

Here is a scastie to test: https://scastie.scala-lang.org/ktfISeSZQNG9iLt7MvUg0g

May I send a PR?

Thanks.

[fthomas]

Thanks for the report, @jbenoit2011! A PR would be very welcome.