:head request stubbing always sets the Content-Length to 0

[dup2]

Describe the bug 🐛

When stubbing a :head request and trying to set a custom "Content-Length" via the headers, the value is always set to "0" in the result.

How to replicate it

WebMock.stub(:head, "http://127.0.0.1:9000/bucket-1/file-1?").
          to_return(headers: { "Content-Length" => "42" })

Expected

Doing the effective request should return headers with Content-Length set to 42