"Undo's" means: steps to undo the last changes (Ctrl+Z).

A file is loaded in an editor/tab. I did some work in the editor and there are
"Undo's". With a VBScript an external program is started which changes the file
externally (tidy). 

How can I load the modified file into the same editor/tab without losing the
"Undo's"?

I have worked on it for many hours and tried many possibilities, unfortunately
without success. :-(

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Odpovedet emailem