BUG: send wrong request body if the last http with a header

[purefun]

GET https://httpbin.org/get

POST https://httpbin.org/post
X-API-KEY: 1

run the second http, the response is:

POST https://httpbin.org/post

HTTP/1.1 200 OK

HTTP/2 200 
date: Thu, 19 Aug 2021 06:14:33 GMT
content-type: application/json
content-length: 550
server: gunicorn/19.9.0
access-control-allow-origin: *
access-control-allow-credentials: true

{
  "args": {},
  "data": "",
  "files": {},
  "form": {
    "GET https://httpbin.org/getPOST https://httpbin.org/postX-API-KEY: 1": ""
  },
  "headers": {
    "Accept": "*/*",
    "Accept-Encoding": "deflate, gzip",
    "Content-Length": "68",
    "Content-Type": "application/x-www-form-urlencoded",
    "Host": "httpbin.org",
    "User-Agent": "curl/7.64.1",
    "X-Amzn-Trace-Id": "Root=1-611df6c9-77835905478000061b24e381",
    "X-Api-Key": "1"
  },
  "json": null,
  "origin": "42.3.18.110",
  "url": "https://httpbin.org/post"
}

[purefun]

GET https://httpbin.org/get

POST https://httpbin.org/post
X-API-KEY: 1

# keep the line

Appending a empty line after the header fixes it.

[jens1205]

should be fixed now