Missing ESSArch_tag in shell script

[karatekaneen]

Steps to reproduce and/or test case demonstrating the problem

When following the automatic installation guide the following command fails:

[robin@essarch-centos ~]$ sudo sh essarch_download /ESSArch_setup
Create ESSArch setup directory: /home/robin/ESSArch_setup
Missing ESSArch_tag - /ESSArch_setup or download url - 

Actual behavior

It doesn't work when following the guide. But if adding a tag it works:
[robin@essarch-centos ESSArch_setup]$ sudo sh essarch_download latest /ESSArch_setup

So either the documentation needs to change or the part where the default value is set in the shell script