LibJS: Fix that windows style line endings were not ignored or converted

These are tested by test262 but the current test262-runner reads the
files in python which automatically converts \r\n to \n.
This meant that we passed the tests while we should not have.

Userland/Libraries/LibJS/Tests/parser-line-terminators.js

@@ -61,6 +61,34 @@ test("line terminators can be mixed (but please don't)", () => {
 test("all line terminators are valid for line continuations", () => {
     expect(Function('return "a\\\nb"')()).toBe("ab");
     expect(Function('return "a\\\rb"')()).toBe("ab");
+    expect(Function('return "a\\\r\nb"')()).toBe("ab");
     expect(Function('return "a\\
b"')()).toBe("ab");
     expect(Function('return "a\\
b"')()).toBe("ab");
 });
+
+test("template-literals raw and real value", () => {
+    let lastTemplate;
+    let lastRaw;
+
+    function tag(cs) {
+        lastTemplate = cs[0];
+        lastRaw = cs.raw[0];
+    }
+
+    function checkTemplate(string_value, expected_template, expected_raw) {
+        eval("tag`" + string_value + "`");
+        expect(lastTemplate).toBe(expected_template);
+        expect(lastRaw).toBe(expected_raw);
+    }
+
+    checkTemplate("", "", "");
+    checkTemplate("\n", "\n", "\n");
+    checkTemplate("\r", "\n", "\n");
+    checkTemplate("\r\n", "\n", "\n");
+    checkTemplate("\n\r\n", "\n\n", "\n\n");
+
+    checkTemplate("a\\\nb", "ab", "a\\\nb");
+    checkTemplate("a\\\rb", "ab", "a\\\nb");
+    checkTemplate("a\\
b", "ab", "a\\
b");
+    checkTemplate("a\\
b", "ab", "a\\
b");
+});