Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: 93712b24bf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibJS/Tests/syntax/numeric-separator.js

@@ -0,0 +1,26 @@
+describe("numeric separators", () => {
+    test("numeric separator works for 'normal' number", () => {
+        expect("1_2").toEvalTo(12);
+        expect("4_2.4_2").toEvalTo(42.42);
+        expect("1_2e0_2").toEvalTo(1200);
+
+        expect("1_2E+_1").not.toEval();
+        expect("1_2E+0_1").toEvalTo(120);
+    });
+
+    test("cannot use numeric separator after .", () => {
+        expect("4._3").not.toEval();
+        expect("0._3").not.toEval();
+        expect("1_.3._3").not.toEval();
+
+        // Actually a valid attempt to get property '_3' on 1.3 which fails but does parse.
+        expect("1.3._3").toEval();
+    });
+
+    test("cannot use numeric separator in octal escaped number", () => {
+        expect("00_1").not.toEval();
+        expect("01_1").not.toEval();
+        expect("07_3").not.toEval();
+        expect("00_1").not.toEval();
+    });
+});