How do I fix the indentation of an entire file in Vi?

Question

In Vim, what is the command to correct the indentation of all the lines?

Often times I\'ll copy and paste code into a remote terminal and have the whole thing messed

Answer 1

You can use tidy application/utility to indent HTML & XML files and it works pretty well in indenting those files.

Prettify an XML file

:!tidy -mi -xml %

Prettify an HTML file

:!tidy -mi -html %