If you just want to remove them, look at the /s flag to the transliteration operator (tr//). If you want to replace them, use a regular expression substitution with backreferences. It may be something like: s/(\w)\1+/$1\* /g;. That's untested, but it should get you on your way.

In reply to Re: remove repeating characters from strings by chromatic
in thread remove repeating characters from strings by Anonymous Monk

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