Add test for comments not directly next to items

Author: repnop

crates/ide_db/src/helpers/insert_use/tests.rs

@@ -429,6 +429,23 @@ fn foo() {}"#,
     );
 }
 
+#[test]
+fn inserts_after_single_line_header_comments_and_before_item() {
+    check_none(
+        "foo::bar::Baz",
+        r#"// Represents a possible license header
+// Line two of possible license header
+
+fn foo() {}"#,
+        r#"// Represents a possible license header
+// Line two of possible license header
+
+use foo::bar::Baz;
+
+fn foo() {}"#,
+    );
+}
+
 #[test]
 fn inserts_after_multiline_inner_comments() {
     check_none(