jx-linux-amd64.tar.gz - not in gzip format

[SabirAliyev]

This is an issue about documentation on:
https://jenkins-x.io/docs/install-setup/install-binary/

I'm trying to install jenkins-x on Linux Ubuntu. But when i try to download it and unzip by your given command

curl -L "https://github.com/jenkins-x/jx/releases/download/$(curl --silent "https://github.com/jenkins-x/jx/releases/latest" | sed 's#.*tag/\(.*\)\".*#\1#')/jx-linux-amd64.tar.gz" | tar xzv "jx"

I get an error:

gzip: stdin: not in gzip format
tar: Child returned status 1
tar: Error is not recoverable: exiting now

When I try to check the file format:

file jx-linux-amd64.tar.gz
jx-linux-amd64.tar.gz: ASCII text, with no line terminators

When I try to extract the archive without '-z' parameter:

tar -xvf jx-linux-amd64.tar.gz
tar: This does not look like a tar archive

So, how do people install it?