Add additional test for brace matching

Author: Andy Hanson

tests/cases/fourslash/getMatchingBraces.ts

@@ -36,6 +36,7 @@
 ////        return [|<any>|] a;
 ////    }
 ////}
+////const x: Array[|<() => void>|] = [];
 
 test.ranges().forEach((range) => {
     verify.matchingBracePositionInCurrentFile(range.start, range.end - 1);