Commit 4253517

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Mark a structured binding as C++17.

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Original file line number	Diff line number	Diff line change
`@@ -133,6 +133,7 @@`
`133`	`133`	`m["hello"] = 1; // inserts new key, def. constr. value`
`134`	`134`	`m["hello"] = 2; // finds existing key`
`135`	`135`	`auto [it, isNewKey] = m.insert({"hello", 0}); // no effect`
	`136`	`+ // ^ C++17: "Structured binding"`
`136`	`137`	`int val = m["world"]; // inserts new key (val == 0)`
`137`	`138`	`int val = m.at("monde"); // throws std::out_of_range`
`138`	`139`

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