[whatwg] Making URLSearchParams set() `value` argument optional

[David Håsäther]

I would like to propose making the `value` argument optional for
URLSearchParams set()[1]. This would work as set("name", ""), but
would not output the equals sign, leading to nicer URLs.

So:

set("name", "") -> "?name="
set("name") -> "?name"

Anne van Kesteren pointed out[2] that this is different from the
application/x-www-form-urlencoded serialization on which it currently
relies on. I'm not sure if that has any implications.

[1] http://url.spec.whatwg.org/#dom-urlsearchparams-set
[2] https://twitter.com/annevk/status/443576248166391808

-- 
David Håsäther