Add test

tests/cases/fourslash/getOutliningSpans.ts

@@ -96,5 +96,18 @@
 //////outline after a deeply nested node
 ////class AfterNestedNodes[| {
 ////}|]
+////// function arguments
+////function f(x: number[], y: number[])[| {
+////    return 3;
+////}|]
+////f(
+//////  single line array literal span won't render in VS
+////    [|[0]|],
+////    [|[
+////        1,
+////        2
+////    ]|]
+////);
+
 
 verify.outliningSpansInCurrentFile(test.ranges(), "code");