doesn't support positive or negative lookbehind syntax #48
Description
Positive lookbehind: (?<=Y)X, matches X, but only if there’s Y before it.
Negative lookbehind: (?<!Y)X, matches X, but only if there’s no Y before it.
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Positive lookbehind: (?<=Y)X, matches X, but only if there’s Y before it.
Negative lookbehind: (?<!Y)X, matches X, but only if there’s no Y before it.