potential return value change in XHEAD operation

[nkr-404-NotFound]

030_Data/20_Exists.asciidoc

in this chapter ,when check the document is exist , send
curl -i -XHEAD http://localhost:9200/website/blog/123

the elastic search returns different with the result offered in doc.
as
HTTP/1.1 200 OK
content-type: application/json; charset=UTF-8
content-length: 185

Notice that content-length is not zero and the request doesn't end properly , Ctrl+C is needed to exit the request.