Add test for semicolon detection in auto-import

tests/cases/fourslash/completionsImport_noSemicolons.ts

@@ -0,0 +1,20 @@
+/// <reference path="fourslash.ts" />
+
+// @Filename: /a.ts
+////export function foo() {}
+
+// @Filename: /b.ts
+////const x = 0
+////const y = 1
+////const z = fo/**/
+
+verify.applyCodeActionFromCompletion("", {
+  name: "foo",
+  source: "/a",
+  description: `Import 'foo' from module "./a"`,
+  newFileContent: `import { foo } from "./a"
+
+const x = 0
+const y = 1
+const z = fo`,
+});