One thing I really like about some of the other text editors I use is the ability to do a Replace with a blank "Replace With" value. I noticed today when I tried to delete about 40 matching lines in a sub that the Replace function will give you an error "You must enter a string to replace with for." if you try to leave the "Replace Text" field blank to simply delete every line that matches the "Find Text" value. A space could work but this would leave a blank line for each delete.
In short, a way to simply Find all matching lines then delete them or replace them with an empty string.
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