.with_port() makes a wrong url when contains IPv6 address

[j178]

Hi,
I noticed that methods like .with_port(), .with_user() and .with_password() return a wrong IPv6 url, example:

from yarl import URL
url = URL('http://[2001:0db8:85a3:0000:0000:8a2e:0370:7334]:8080/')
print(url.with_port(80))

prints:

http://2001:db8:85a3::8a2e:370:7334:80/

The problem is in this line:

yarl/yarl/__init__.py

Line 839 in 9949de4

val.username, val.password, val.hostname, port, encode=False

We should use self._make_netloc(..., encode=True) to produce the right url.