[florimondmanca]

Fixes #366

Re-running the example from #366 (comment):

import httpx
import requests

URL = "https://httpbin.org/get"
PARAMS = {"documentIds": ["a55b2f894b90dd1213201471_25", "b54b2f894b90dd1213201471_9"]}

resp = requests.get(URL, params=PARAMS)
print("requests", resp.json()["args"])

r = httpx.get(URL, params=PARAMS)
json = r.json()
assert isinstance(json, dict)
print("httpx", json["args"])

print("httpx", str(httpx.QueryParams(PARAMS)))

requests {'documentIds': ['a55b2f894b90dd1213201471_25', 'b54b2f894b90dd1213201471_9']}
httpx {'documentIds': ['a55b2f894b90dd1213201471_25', 'b54b2f894b90dd1213201471_9']}
httpx documentIds=a55b2f894b90dd1213201471_25&documentIds=b54b2f894b90dd1213201471_9

.

[florimondmanca]

@tomchristie @sethmlarson Ready for re-review! :-)

[sethmlarson]

This is a great change, thanks @florimondmanca! :)