test-js: Use prettier and format all files

Author: https://github.com/mattco98
Commit: 6d58c48c2f
Pull-request: https://github.com/SerenityOS/serenity/pull/2689
Reviewed-by: https://github.com/linusg

Libraries/LibJS/Tests/program-strict-mode.js

@@ -3,28 +3,27 @@
 load("test-common.js");
 
 try {
+  assert(isStrictMode());
+
+  (function () {
     assert(isStrictMode());
+  })();
 
-    (function() {
-       assert(isStrictMode());
-    })();
+  (function () {
+    "use strict";
+    assert(isStrictMode());
+  })();
 
-    (function() {
-        "use strict";
-         assert(isStrictMode());
-    })();
+  (() => {
+    assert(isStrictMode());
+  })();
 
+  (() => {
+    "use strict";
+    assert(isStrictMode());
+  })();
 
-    (() => {
-        assert(isStrictMode());
-    })();
-
-    (() => {
-        "use strict";
-        assert(isStrictMode());
-    })();
-
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }