RSS Widget removes squared brackets »[« »]« from urls that link to the post

[azaozz]

clean_url() removes the brackets but a patch for that would need a lot of testing.

[solarissmoke]

From ​RFC 3986:

A host identified by an Internet Protocol literal address, version 6
[RFC3513] or later, is distinguished by enclosing the IP literal
within square brackets ("[" and "]"). This is the only place where
square bracket characters are allowed in the URI syntax.

In other words, you shouldn't be having square brackets in a URL. And if you do, they should be urlencoded. I just tested an supplying the RSS Widget with urlencoded brackets works fine.

Feel free to reopen if I've missed something.