Reformat or fix the indentation of an entire file in vim
This short guide will help you reformat or fix the indentation of an entire file in Vim -- all at once!
Posted in these interests:
I wrote a separate guide that will show you how to set indentation rules in Vim.
gg=G"=" is the indent command and it can takes motions. So "gg" means start at the beginning of the file and "G" means finish at the end.