I didn't try it, but it sounds like it would work fine for me. In fact, I haven't even implemented my version into the script I want to use it in, but what I'm currently using works too. It's just that what I'm currently using puts no limit on the length of the string (used as a variable name), which could look sloppy, and I tried creating something a little "smarter" than your version. But since my version needs only a slight tweak to function as Text::Abbrev (with added features), I think I'll eventually add that functionality and make it a module.
By the way, if I made my script a module and didn't include its code in the line count, my code could be even shorter than your module using code.
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