Appended %

Hi
nice service!
gave it a try and it worked fine, except the output included an appended '%' in the download url which I had to remove to get the download link to work...is this the expected behaviour?

```
* We are completely uploaded and fine
< HTTP/2 200
< content-type: text/plain
< server: Transfer.sh HTTP Server
< x-made-with: <3 by DutchCoders
< x-served-by: Proudly served by DutchCoders
< x-url-delete: https://transfer.sh/bJdkQBmTK1/hello.txt/pCRmyqvmnJOfx02jALNF
< content-length: 40
< date: Sun, 15 Oct 2023 13:16:27 GMT
<
* Connection #0 to host transfer.sh left intact
https://transfer.sh/bJdkQBmTK1/hello.txt%
```

os: macOS 13.6
curl: curl 8.1.2 (x86_64-apple-darwin22.0) libcurl/8.1.2 (SecureTransport) LibreSSL/3.3.6 zlib/1.2.11 nghttp2/1.51.0

thanks
L.

Reproduce the upload with curl using the reported macOS and curl details, then trace where the download URL is generated and written to the response. Confirm the behavior against the sample response; done means the returned URL does not include the appended '%' and works directly as a download link.

Written by the indexing model from the issue text.