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like so
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*means "zero or more of the previous character", you need.*\.htmlprobably. Good luck.*as the first character in a regexp is undefined behavior per POSIX so YMMV with what any awk would do with that.foojust writefoo$. Adding.*in a regexp (or*in a globbing pattern) in front offoois pointless unless you wanted to capture the matching string to do something with it, which you don't.