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Answers and rating deltas for
What does `?` mean in this Perl regex?
| Author | Votes | Δ |
|---|---|---|
| eldarerathis | 21 | +3.43 |
| Sinan Ünür | 6 | +0.58 |
| Alin Purcaru | 2 | +0.86 |
| brian d foy | 1 | -0.75 |
| Dave Cross | 1 | -2.90 |
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