Fair enough on the complexity of the "other" characters line. It is spelled out with explicit characters specifically to make it easier to add or remove given characters from the list. At the time, I think I had some warning that came up with the nested parens. Unfortunately my memory is a bit vague on that point. Those may simply have due to been a typo at the time. I will say though that with the use of "use strict; use warnings;" I do get at least the following warning:
Possible attempt to separate words with commas at test line X.
I'm sure there are more elegant ways to write the list though, including your fine use of map chr.
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