Don't use short notatnion arg_separator

[bato3]

When url is ?foo=&not_foo= browsers interpret it as one value ?foo=¬_foo= --> ?foo=¬_foo=

[acoulton]

Hi @bato3, thanks for the pull request. Unfortunately this isn't correct - the URL should originally be returned with the unescaped & separator.

Escaping the & to & is only sometimes appropriate, depending on where you're using the generated URL. For example, you wouldn't want to escape it in a JSON response, a plain-text email, or a Location: redirect header.

You do need to encode URLs in href (or any other) HTML attributes - but in that case there are other characters that may need to be escaped, not just the &. You should use HTML::chars, HTML::anchor or HTML::attributes (or another suitable method) to escape your link attributes for display.

If I've misunderstood the problem you're having, feel free to reopen with more details.