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DOC: fix a confusing typo on a regsub example
S�bastien reported a confusing example in the doc about regsub when used with quotes. Nested quotes are already not trivial to grasp, but when typos are there and result in something valid, it's even worse. The closing quote ought to have been inside the brackets. However haproxy will not make any difference because the single quotes delimit a word and the delimited word remains the same. Let's just not add yet another level of confusion.
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@ -15476,7 +15476,7 @@ regsub(<regex>,<subst>[,<flags>])
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# capture groups and backreferences
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# both lines do the same.
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http-request redirect location %[url,'regsub("(foo|bar)([0-9]+)?","\2\1",i)]'
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http-request redirect location %[url,'regsub("(foo|bar)([0-9]+)?","\2\1",i)']
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http-request redirect location %[url,regsub(\"(foo|bar)([0-9]+)?\",\"\2\1\",i)]
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capture-req(<id>)
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