[perl #128077] [BUG] `comb "foo"` does not work the same way as `"foo".comb`

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# New Ticket Created by  Alex Brooke 
# Please include the string:  [perl #128077]
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    > comb "foo";
    ===SORRY!=== Error while compiling <unknown file>
    Calling comb(Str) will never work with proto signature ($,, $?)
    at <unknown file>:1
    ------> <BOL><HERE>comb "foo";

But:

    > "foo".comb
    (f o o)
-- 

*Quidquid* *latine** dictum sit, **altum* *sonatur**.*