VIM: indent multiple files at once

[peter_b]

I often use vim to quickly beautify / pretty-print structured text - like XML or programming code, etc:

In VIM this is:

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gg
=G

gg: Go to top
=: indent
G: until bottom.


In order to do this with multiple files, do the following:

1) Open the files you want to indent in tabs.
For example all XMLs in the current folder:

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$ vim -p *.xml

2) Now use "tabdo" command to apply a command to all open tabs.
But how to translate the "gg=G"?
It works by putting the command "normal" before:

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:tabdo normal gg=G