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Merge commit '35dec7c96f7ee3eb17dd444f7067f0c776fb56ae'
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@@ -1,3 +1,7 @@
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# Do not remove front matter.
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When specifying the regular expression, use a raw [string literal] (backticks) instead of an interpreted string literal (double quotes) to simplify the syntax. With an interpreted string literal you must escape backslashes.
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Go's regular expression package implements the [RE2 syntax]. The RE2 syntax is a subset of that accepted by [PCRE], roughly speaking, and with various [caveats]. Note that the RE2 `\C` escape sequence is not supported.
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