[5.7] Tighten up some syntax rules #428
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PCRE treats them as octal, but we require a `0` prefix.
Ban multi-scalar characters that start with ASCII, and are not letters, numbers, or `\r\n`. These may be confused with metacharacters and as such should be spelled explicitly.
Ban a balanced set of `<{...}>` delimiters for a
potential future interpolation syntax.
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@swift-ci please test |
stephentyrone
approved these changes
May 24, 2022
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5.7 cherry-pick of #393
[\7]. In PCRE, this is an octal sequence, but we require a0prefix.<{...}>for a future interpolation syntax.Resolves #303