How to set new environment variable on Mac

In order to instal on your Mac a new environment variable like HOME or PATH edit your profile file.

How to edit your profile see in this post or this one the last one is best choice.

Indent tool for the HTML

If you look for a tool that will check indents and etc of your HTML use HTML TIDY 

Online version: http://infohound.net/tidy/

In VIM you can use the command gg=G in order to correct your indention.