Typo in `String#match` (lib.es2015.symbol.wellknown)

TypeScript Version: 3.0.0-dev.201xxxxx

Search Terms:
typos, string, lib, es2015.symbol.wellknown

I've wiped the majority of the template since this is a typo report.
I was originally going to just make a PR but the template had:

• There is an associated issue in the Backlog milestone (required)

The typo itself is that String#match in lib.es2015.symbol.wellknown has it's param description pasted in the middle of it's method description:

https://github.com/microsoft/TypeScript/blob/d2c5d54242c69effbed0ebb27033047e0c995589/src/lib/es2015.symbol.wellknown.d.ts#L209-L212

My PR replaced it with "with a regular expression" - Let me know what the correct way to proceed with this is 🙂

誤りは src/lib/es2015.symbol.wellknown.d.ts の 209-212 行付近にあります。まず、そこにある String#match の宣言コメントを読んでください。メソッドの説明にある重複したパラメーターの説明を修正し、その後、宣言テキストが正規表現によるマッチングを正確に説明していることを確認してください。