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This issue is a superset of issue #26810. This will allow us to replace tabs, newlines or any other combinations we can dream of. Other editors support this and it works quite well.
I should point out that the file-system FIND operation already supports searching for regular expressions so reusing that code in the editor should be rather easy. Their UI is pretty decent as well.
One other approach (used by TextPad, another editor) is that you have a single SEARCH/REPLACE UI with a checkbox that reads "regular expression" and when enabled, both source/target strings are assumed to be regular expressions.
Yes, I agree that we should finally find a time to implement this feature into promoD or share the functionality with find-in-FS.
*** This issue has been marked as a duplicate of 19680 ***