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Answers and rating deltas for

How can I golf this Perl subroutine that does a substitution?

Author Votes Δ
Robert P 8 +1.51
Evan Carroll 6 +3.33
Sean 3 +1.81
Sinan Ünür 3 +0.67
ziya 1 +0.30
brian d foy 1 -0.02
Greg Bacon 0 -1.41
ghostdog74 0 -0.61
philant 0 -1.04
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