Added test where one trailing flag exists.

tests/cases/fourslash/completionListAfterRegularExpressionLiteral05.ts

@@ -0,0 +1,10 @@
+/// <reference path="fourslash.ts" />
+
+////let v = 100;
+////let x = /absidey/g/**/
+
+// Should get nothing at the marker since it's
+// going to be considered part of the regex flags.
+
+goTo.marker();
+verify.completionListIsEmpty()