Formatting file breaks history (undo/redo)

[panbroggi]

I am editing (mostly) julia files. I noticed that formatting a file with Alt+shift+R breaks the history of file modifications, accessible with undo/redo.
This is particularily unpleasant when formatting an unsaved file, since it is not possible to recover the unsaved edits.

[PerilousBooklet]

Can you please send me a copy of the code you're trying to format?

[panbroggi]

Here is a working example. If you create a file with this content:

a = 1+1
println( "Hello world!")

and save the file ctrl+s. Now press alt+shift+f, it will be formatted to

a = 1 + 1
println("Hello world!")

correctly. However, if you press ctrl+z the file won't revert to the previous stage.
I noticed that if you don't save the file, you can revert.

[vincens2005]

This is because the formatter formats the file in place, so it has to be saved to format, and when it's reloaded the history is lost. Perhaps I should fix this