LibJS: Indent tests with 4 spaces instead of 2

Author: https://github.com/mattco98
Commit: 1ef573eb30
Pull-request: https://github.com/SerenityOS/serenity/pull/2689
Reviewed-by: https://github.com/linusg

Libraries/LibJS/Tests/string-escapes.js

@@ -1,13 +1,13 @@
 test("hex escapes", () => {
-  expect("\x55").toBe("U");
-  expect("X55").toBe("X55");
-  expect(`\x55`).toBe("U");
-  expect(`\X55`).toBe("X55");
+    expect("\x55").toBe("U");
+    expect("X55").toBe("X55");
+    expect(`\x55`).toBe("U");
+    expect(`\X55`).toBe("X55");
 });
 
 test("unicode escapes", () => {
-  expect("\u26a0").toBe("⚠");
-  expect(`\u26a0`).toBe("⚠");
-  expect("\u{1f41e}").toBe("🐞");
-  expect(`\u{1f41e}`).toBe("🐞");
+    expect("\u26a0").toBe("⚠");
+    expect(`\u26a0`).toBe("⚠");
+    expect("\u{1f41e}").toBe("🐞");
+    expect(`\u{1f41e}`).toBe("🐞");
 });