Fix typo in docs

See https://github.com/rescript-lang/rescript-editor-support/issues/17

Author: bsansouci

jscomp/others/js_re.ml

@@ -162,7 +162,7 @@ external unicode : t -> bool = "unicode" [@@bs.get]
  * Ignore case
  *)
 
-let re = [%re "/quick\s(brown).+?(jumps)/ig" in
+let re = [%re "/quick\s(brown).+?(jumps)/ig"] in
 let result = re |. Js.Re.exec_ "The Quick Brown Fox Jumps Over The Lazy Dog"
 ]}