=== tests/cases/compiler/b.ts ===
///<reference path="a.ts"/>
module ElidedModule3 {
>ElidedModule3 : unknown
}
=== tests/cases/compiler/a.ts ===
/*! Keep this pinned comment */
module ElidedModule {
>ElidedModule : unknown
}

// Don't keep this comment.
module ElidedModule2 {
>ElidedModule2 : unknown
}