Let's do it in unicode, perl -pi -e's/(\p{IsUpper})/\t$1/g' text.txt If you have some way of determining whether you want spaces or tabs, you should say what it is.

After Compline,
Zaxo

In reply to Re: Editing File In-Place to put tab before UpperCase Letters by Zaxo
in thread Editing File In-Place to put tab before UpperCase Letters by ranjan_jajodia

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